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Finding the Fourth Proportional to 553,498.63, 763,828.10 and 311,781.20

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Solution

The fourth proportional to 553,498.63, 763,828.10 and 311,781.20 is: 430,258.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,498.63 : 763,828.10 = 311,781.20 : x
  2. Step 2: Convert to fraction form
    553,498.63/763,828.10 = 311,781.20/x
  3. Step 3: Cross multiply
    553,498.63x = 763,828.10 × 311,781.20
  4. Step 4: Simplify right side
    553,498.63x = 238,147,244,300.74
  5. Step 5: Solve for x
    x = 238,147,244,300.74/553,498.63
  6. Step 6: Final answer
    x = 430,258.06

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