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Finding the Fourth Proportional to 300,578.86, 450,937.41 and 90,220.78

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Solution

The fourth proportional to 300,578.86, 450,937.41 and 90,220.78 is: 135,351.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,578.86 : 450,937.41 = 90,220.78 : x
  2. Step 2: Convert to fraction form
    300,578.86/450,937.41 = 90,220.78/x
  3. Step 3: Cross multiply
    300,578.86x = 450,937.41 × 90,220.78
  4. Step 4: Simplify right side
    300,578.86x = 40,683,924,861.38
  5. Step 5: Solve for x
    x = 40,683,924,861.38/300,578.86
  6. Step 6: Final answer
    x = 135,351.92

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