Finding the Fourth Proportional to 10,509.13, 14,502.40 and 5,729.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,509.13 : 14,502.40 = 5,729.12 : x
2. Step 2: Convert to fraction form
   10,509.13/14,502.40 = 5,729.12/x
3. Step 3: Cross multiply
   10,509.13x = 14,502.40 × 5,729.12
4. Step 4: Simplify right side
   10,509.13x = 83,085,978.92
5. Step 5: Solve for x
   x = 83,085,978.92/10,509.13
6. Step 6: Final answer
   x = 7,906.07