Finding the Fourth Proportional to 8,238.92, 12,370.72 and 7,131.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,238.92 : 12,370.72 = 7,131.76 : x
2. Step 2: Convert to fraction form
   8,238.92/12,370.72 = 7,131.76/x
3. Step 3: Cross multiply
   8,238.92x = 12,370.72 × 7,131.76
4. Step 4: Simplify right side
   8,238.92x = 88,225,006.07
5. Step 5: Solve for x
   x = 88,225,006.07/8,238.92
6. Step 6: Final answer
   x = 10,708.32