Finding the Fourth Proportional to 10,428.75, 14,391.69 and 5,713.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.75 : 14,391.69 = 5,713.08 : x
2. Step 2: Convert to fraction form
   10,428.75/14,391.69 = 5,713.08/x
3. Step 3: Cross multiply
   10,428.75x = 14,391.69 × 5,713.08
4. Step 4: Simplify right side
   10,428.75x = 82,220,876.31
5. Step 5: Solve for x
   x = 82,220,876.31/10,428.75
6. Step 6: Final answer
   x = 7,884.06