Finding the Fourth Proportional to 8,238.31, 12,351.99 and 5,315.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,238.31 : 12,351.99 = 5,315.02 : x
2. Step 2: Convert to fraction form
   8,238.31/12,351.99 = 5,315.02/x
3. Step 3: Cross multiply
   8,238.31x = 12,351.99 × 5,315.02
4. Step 4: Simplify right side
   8,238.31x = 65,651,062.94
5. Step 5: Solve for x
   x = 65,651,062.94/8,238.31
6. Step 6: Final answer
   x = 7,969.00