Finding the Fourth Proportional to 8,328.27, 12,488.76 and 3,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,328.27 : 12,488.76 = 3,130.50 : x
2. Step 2: Convert to fraction form
   8,328.27/12,488.76 = 3,130.50/x
3. Step 3: Cross multiply
   8,328.27x = 12,488.76 × 3,130.50
4. Step 4: Simplify right side
   8,328.27x = 39,096,063.18
5. Step 5: Solve for x
   x = 39,096,063.18/8,328.27
6. Step 6: Final answer
   x = 4,694.38