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Finding the Fourth Proportional to 411,389.20, 618,120.60 and 261,701.20

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Solution

The fourth proportional to 411,389.20, 618,120.60 and 261,701.20 is: 393,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,389.20 : 618,120.60 = 261,701.20 : x
  2. Step 2: Convert to fraction form
    411,389.20/618,120.60 = 261,701.20/x
  3. Step 3: Cross multiply
    411,389.20x = 618,120.60 × 261,701.20
  4. Step 4: Simplify right side
    411,389.20x = 161,762,902,764.72
  5. Step 5: Solve for x
    x = 161,762,902,764.72/411,389.20
  6. Step 6: Final answer
    x = 393,211.35

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