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Finding the Fourth Proportional to 1,317,765.60, 1,978,981.20 and 1,018,972.80

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Solution

The fourth proportional to 1,317,765.60, 1,978,981.20 and 1,018,972.80 is: 1,530,263.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,765.60 : 1,978,981.20 = 1,018,972.80 : x
  2. Step 2: Convert to fraction form
    1,317,765.60/1,978,981.20 = 1,018,972.80/x
  3. Step 3: Cross multiply
    1,317,765.60x = 1,978,981.20 × 1,018,972.80
  4. Step 4: Simplify right side
    1,317,765.60x = 2,016,528,014,511.36
  5. Step 5: Solve for x
    x = 2,016,528,014,511.36/1,317,765.60
  6. Step 6: Final answer
    x = 1,530,263.06

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