Finding the Fourth Proportional to 12,847.59, 17,702.01 and 8,648.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,847.59 : 17,702.01 = 8,648.55 : x
2. Step 2: Convert to fraction form
   12,847.59/17,702.01 = 8,648.55/x
3. Step 3: Cross multiply
   12,847.59x = 17,702.01 × 8,648.55
4. Step 4: Simplify right side
   12,847.59x = 153,096,718.59
5. Step 5: Solve for x
   x = 153,096,718.59/12,847.59
6. Step 6: Final answer
   x = 11,916.38