Finding the Fourth Proportional to 11,382.72, 15,699.24 and 7,405.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,382.72 : 15,699.24 = 7,405.11 : x
2. Step 2: Convert to fraction form
   11,382.72/15,699.24 = 7,405.11/x
3. Step 3: Cross multiply
   11,382.72x = 15,699.24 × 7,405.11
4. Step 4: Simplify right side
   11,382.72x = 116,254,599.12
5. Step 5: Solve for x
   x = 116,254,599.12/11,382.72
6. Step 6: Final answer
   x = 10,213.25