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Finding the Fourth Proportional to 7,878.72, 11,817.80 and 1,955.64

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Solution

The fourth proportional to 7,878.72, 11,817.80 and 1,955.64 is: 2,933.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.72 : 11,817.80 = 1,955.64 : x
  2. Step 2: Convert to fraction form
    7,878.72/11,817.80 = 1,955.64/x
  3. Step 3: Cross multiply
    7,878.72x = 11,817.80 × 1,955.64
  4. Step 4: Simplify right side
    7,878.72x = 23,111,362.39
  5. Step 5: Solve for x
    x = 23,111,362.39/7,878.72
  6. Step 6: Final answer
    x = 2,933.39

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