Finding the Fourth Proportional to 11,308.48, 15,587.71 and 8,914.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,308.48 : 15,587.71 = 8,914.57 : x
2. Step 2: Convert to fraction form
   11,308.48/15,587.71 = 8,914.57/x
3. Step 3: Cross multiply
   11,308.48x = 15,587.71 × 8,914.57
4. Step 4: Simplify right side
   11,308.48x = 138,957,731.93
5. Step 5: Solve for x
   x = 138,957,731.93/11,308.48
6. Step 6: Final answer
   x = 12,287.92