Finding the Fourth Proportional to 12,581.64, 17,354.79 and 8,100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,581.64 : 17,354.79 = 8,100.72 : x
2. Step 2: Convert to fraction form
   12,581.64/17,354.79 = 8,100.72/x
3. Step 3: Cross multiply
   12,581.64x = 17,354.79 × 8,100.72
4. Step 4: Simplify right side
   12,581.64x = 140,586,294.45
5. Step 5: Solve for x
   x = 140,586,294.45/12,581.64
6. Step 6: Final answer
   x = 11,173.92