Finding the Fourth Proportional to 11,404.17, 17,113.92 and 8,587.02

Step by Step Solution

1. Step 1: Write the proportion equation
   11,404.17 : 17,113.92 = 8,587.02 : x
2. Step 2: Convert to fraction form
   11,404.17/17,113.92 = 8,587.02/x
3. Step 3: Cross multiply
   11,404.17x = 17,113.92 × 8,587.02
4. Step 4: Simplify right side
   11,404.17x = 146,957,573.32
5. Step 5: Solve for x
   x = 146,957,573.32/11,404.17
6. Step 6: Final answer
   x = 12,886.30