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Finding the Fourth Proportional to 388,940, 583,410 and 126,284

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Solution

The fourth proportional to 388,940, 583,410 and 126,284 is: 189,426

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,940 : 583,410 = 126,284 : x
  2. Step 2: Convert to fraction form
    388,940/583,410 = 126,284/x
  3. Step 3: Cross multiply
    388,940x = 583,410 × 126,284
  4. Step 4: Simplify right side
    388,940x = 73,675,348,440
  5. Step 5: Solve for x
    x = 73,675,348,440/388,940
  6. Step 6: Final answer
    x = 189,426

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