Finding the Fourth Proportional to 11,124.14, 15,345.25 and 7,145.87

Step by Step Solution

1. Step 1: Write the proportion equation
   11,124.14 : 15,345.25 = 7,145.87 : x
2. Step 2: Convert to fraction form
   11,124.14/15,345.25 = 7,145.87/x
3. Step 3: Cross multiply
   11,124.14x = 15,345.25 × 7,145.87
4. Step 4: Simplify right side
   11,124.14x = 109,655,153.34
5. Step 5: Solve for x
   x = 109,655,153.34/11,124.14
6. Step 6: Final answer
   x = 9,857.41