Finding the Fourth Proportional to 11,272.37, 15,537.89 and 8,878.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,272.37 : 15,537.89 = 8,878.55 : x
2. Step 2: Convert to fraction form
   11,272.37/15,537.89 = 8,878.55/x
3. Step 3: Cross multiply
   11,272.37x = 15,537.89 × 8,878.55
4. Step 4: Simplify right side
   11,272.37x = 137,953,877.77
5. Step 5: Solve for x
   x = 137,953,877.77/11,272.37
6. Step 6: Final answer
   x = 12,238.24