Finding the Fourth Proportional to 12,587.88, 17,367.62 and 8,113.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,587.88 : 17,367.62 = 8,113.16 : x
2. Step 2: Convert to fraction form
   12,587.88/17,367.62 = 8,113.16/x
3. Step 3: Cross multiply
   12,587.88x = 17,367.62 × 8,113.16
4. Step 4: Simplify right side
   12,587.88x = 140,906,279.88
5. Step 5: Solve for x
   x = 140,906,279.88/12,587.88
6. Step 6: Final answer
   x = 11,193.81