Finding the Fourth Proportional to 11,003.94, 15,186.96 and 7,644.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.94 : 15,186.96 = 7,644.90 : x
2. Step 2: Convert to fraction form
   11,003.94/15,186.96 = 7,644.90/x
3. Step 3: Cross multiply
   11,003.94x = 15,186.96 × 7,644.90
4. Step 4: Simplify right side
   11,003.94x = 116,102,790.50
5. Step 5: Solve for x
   x = 116,102,790.50/11,003.94
6. Step 6: Final answer
   x = 10,551.02