Finding the Fourth Proportional to 11,140.13, 15,380.37 and 7,168.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,140.13 : 15,380.37 = 7,168.15 : x
2. Step 2: Convert to fraction form
   11,140.13/15,380.37 = 7,168.15/x
3. Step 3: Cross multiply
   11,140.13x = 15,380.37 × 7,168.15
4. Step 4: Simplify right side
   11,140.13x = 110,248,799.22
5. Step 5: Solve for x
   x = 110,248,799.22/11,140.13
6. Step 6: Final answer
   x = 9,896.55