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Finding the Fourth Proportional to 1,856.94, 2,785.65 and 1,639.62

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Solution

The fourth proportional to 1,856.94, 2,785.65 and 1,639.62 is: 2,459.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.94 : 2,785.65 = 1,639.62 : x
  2. Step 2: Convert to fraction form
    1,856.94/2,785.65 = 1,639.62/x
  3. Step 3: Cross multiply
    1,856.94x = 2,785.65 × 1,639.62
  4. Step 4: Simplify right side
    1,856.94x = 4,567,407.45
  5. Step 5: Solve for x
    x = 4,567,407.45/1,856.94
  6. Step 6: Final answer
    x = 2,459.64

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