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Finding the Fourth Proportional to 645,466.79, 890,775.71 and 358,980.72

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Solution

The fourth proportional to 645,466.79, 890,775.71 and 358,980.72 is: 495,410.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,466.79 : 890,775.71 = 358,980.72 : x
  2. Step 2: Convert to fraction form
    645,466.79/890,775.71 = 358,980.72/x
  3. Step 3: Cross multiply
    645,466.79x = 890,775.71 × 358,980.72
  4. Step 4: Simplify right side
    645,466.79x = 319,771,303,939.41
  5. Step 5: Solve for x
    x = 319,771,303,939.41/645,466.79
  6. Step 6: Final answer
    x = 495,410.94

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