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Finding the Fourth Proportional to 70,674, 106,011.24 and 21,426

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Solution

The fourth proportional to 70,674, 106,011.24 and 21,426 is: 32,139.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,674 : 106,011.24 = 21,426 : x
  2. Step 2: Convert to fraction form
    70,674/106,011.24 = 21,426/x
  3. Step 3: Cross multiply
    70,674x = 106,011.24 × 21,426
  4. Step 4: Simplify right side
    70,674x = 2,271,396,828.24
  5. Step 5: Solve for x
    x = 2,271,396,828.24/70,674
  6. Step 6: Final answer
    x = 32,139.07

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