Finding the Fourth Proportional to 11,031.30, 15,205.50 and 8,637.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,031.30 : 15,205.50 = 8,637.24 : x
2. Step 2: Convert to fraction form
   11,031.30/15,205.50 = 8,637.24/x
3. Step 3: Cross multiply
   11,031.30x = 15,205.50 × 8,637.24
4. Step 4: Simplify right side
   11,031.30x = 131,333,552.82
5. Step 5: Solve for x
   x = 131,333,552.82/11,031.30
6. Step 6: Final answer
   x = 11,905.54