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Finding the Fourth Proportional to 494,906.60, 742,384.20 and 258,710.60

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Solution

The fourth proportional to 494,906.60, 742,384.20 and 258,710.60 is: 388,078.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,906.60 : 742,384.20 = 258,710.60 : x
  2. Step 2: Convert to fraction form
    494,906.60/742,384.20 = 258,710.60/x
  3. Step 3: Cross multiply
    494,906.60x = 742,384.20 × 258,710.60
  4. Step 4: Simplify right side
    494,906.60x = 192,062,661,812.52
  5. Step 5: Solve for x
    x = 192,062,661,812.52/494,906.60
  6. Step 6: Final answer
    x = 388,078.60

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