Finding the Fourth Proportional to 10,240.39, 15,369.69 and 5,313.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,240.39 : 15,369.69 = 5,313.43 : x
2. Step 2: Convert to fraction form
   10,240.39/15,369.69 = 5,313.43/x
3. Step 3: Cross multiply
   10,240.39x = 15,369.69 × 5,313.43
4. Step 4: Simplify right side
   10,240.39x = 81,665,695.09
5. Step 5: Solve for x
   x = 81,665,695.09/10,240.39
6. Step 6: Final answer
   x = 7,974.87