Finding the Fourth Proportional to 11,399.77, 15,731.94 and 7,151.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,399.77 : 15,731.94 = 7,151.01 : x
2. Step 2: Convert to fraction form
   11,399.77/15,731.94 = 7,151.01/x
3. Step 3: Cross multiply
   11,399.77x = 15,731.94 × 7,151.01
4. Step 4: Simplify right side
   11,399.77x = 112,499,260.26
5. Step 5: Solve for x
   x = 112,499,260.26/11,399.77
6. Step 6: Final answer
   x = 9,868.56