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Finding the Fourth Proportional to 1,317,345.68, 1,978,663.80 and 785,905.04

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Solution

The fourth proportional to 1,317,345.68, 1,978,663.80 and 785,905.04 is: 1,180,435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,345.68 : 1,978,663.80 = 785,905.04 : x
  2. Step 2: Convert to fraction form
    1,317,345.68/1,978,663.80 = 785,905.04/x
  3. Step 3: Cross multiply
    1,317,345.68x = 1,978,663.80 × 785,905.04
  4. Step 4: Simplify right side
    1,317,345.68x = 1,555,041,852,885.55
  5. Step 5: Solve for x
    x = 1,555,041,852,885.55/1,317,345.68
  6. Step 6: Final answer
    x = 1,180,435.69

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