Finding the Fourth Proportional to 12,902.28, 17,787.15 and 8,654.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,902.28 : 17,787.15 = 8,654.10 : x
2. Step 2: Convert to fraction form
   12,902.28/17,787.15 = 8,654.10/x
3. Step 3: Cross multiply
   12,902.28x = 17,787.15 × 8,654.10
4. Step 4: Simplify right side
   12,902.28x = 153,931,774.82
5. Step 5: Solve for x
   x = 153,931,774.82/12,902.28
6. Step 6: Final answer
   x = 11,930.59