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Finding the Fourth Proportional to 413,257.42, 618,470.64 and 287,039.98

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Solution

The fourth proportional to 413,257.42, 618,470.64 and 287,039.98 is: 429,576.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,257.42 : 618,470.64 = 287,039.98 : x
  2. Step 2: Convert to fraction form
    413,257.42/618,470.64 = 287,039.98/x
  3. Step 3: Cross multiply
    413,257.42x = 618,470.64 × 287,039.98
  4. Step 4: Simplify right side
    413,257.42x = 177,525,800,136.19
  5. Step 5: Solve for x
    x = 177,525,800,136.19/413,257.42
  6. Step 6: Final answer
    x = 429,576.80

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