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Finding the Fourth Proportional to 1,318,886.70, 1,978,986.15 and 520,194.30

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Solution

The fourth proportional to 1,318,886.70, 1,978,986.15 and 520,194.30 is: 780,550.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,886.70 : 1,978,986.15 = 520,194.30 : x
  2. Step 2: Convert to fraction form
    1,318,886.70/1,978,986.15 = 520,194.30/x
  3. Step 3: Cross multiply
    1,318,886.70x = 1,978,986.15 × 520,194.30
  4. Step 4: Simplify right side
    1,318,886.70x = 1,029,457,315,008.95
  5. Step 5: Solve for x
    x = 1,029,457,315,008.95/1,318,886.70
  6. Step 6: Final answer
    x = 780,550.23

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