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Finding the Fourth Proportional to 520,059.10, 780,088.65 and 431,412.70

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Solution

The fourth proportional to 520,059.10, 780,088.65 and 431,412.70 is: 647,119.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,059.10 : 780,088.65 = 431,412.70 : x
  2. Step 2: Convert to fraction form
    520,059.10/780,088.65 = 431,412.70/x
  3. Step 3: Cross multiply
    520,059.10x = 780,088.65 × 431,412.70
  4. Step 4: Simplify right side
    520,059.10x = 336,540,150,735.86
  5. Step 5: Solve for x
    x = 336,540,150,735.86/520,059.10
  6. Step 6: Final answer
    x = 647,119.05

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