Finding the Fourth Proportional to 10,139.15, 15,208.38 and 9,530.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.15 : 15,208.38 = 9,530.43 : x
2. Step 2: Convert to fraction form
   10,139.15/15,208.38 = 9,530.43/x
3. Step 3: Cross multiply
   10,139.15x = 15,208.38 × 9,530.43
4. Step 4: Simplify right side
   10,139.15x = 144,942,401.00
5. Step 5: Solve for x
   x = 144,942,401.00/10,139.15
6. Step 6: Final answer
   x = 14,295.33