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Finding the Fourth Proportional to 561,213.40, 774,491.10 and 306,568.76

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Solution

The fourth proportional to 561,213.40, 774,491.10 and 306,568.76 is: 423,073.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,213.40 : 774,491.10 = 306,568.76 : x
  2. Step 2: Convert to fraction form
    561,213.40/774,491.10 = 306,568.76/x
  3. Step 3: Cross multiply
    561,213.40x = 774,491.10 × 306,568.76
  4. Step 4: Simplify right side
    561,213.40x = 237,434,776,158.04
  5. Step 5: Solve for x
    x = 237,434,776,158.04/561,213.40
  6. Step 6: Final answer
    x = 423,073.96

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