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Finding the Fourth Proportional to 512,491.20, 768,736.80 and 291,307.20

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Solution

The fourth proportional to 512,491.20, 768,736.80 and 291,307.20 is: 436,960.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,491.20 : 768,736.80 = 291,307.20 : x
  2. Step 2: Convert to fraction form
    512,491.20/768,736.80 = 291,307.20/x
  3. Step 3: Cross multiply
    512,491.20x = 768,736.80 × 291,307.20
  4. Step 4: Simplify right side
    512,491.20x = 223,938,564,744.96
  5. Step 5: Solve for x
    x = 223,938,564,744.96/512,491.20
  6. Step 6: Final answer
    x = 436,960.80

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