Finding the Fourth Proportional to 9,377.50, 12,951.58 and 6,388.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,377.50 : 12,951.58 = 6,388.15 : x
2. Step 2: Convert to fraction form
   9,377.50/12,951.58 = 6,388.15/x
3. Step 3: Cross multiply
   9,377.50x = 12,951.58 × 6,388.15
4. Step 4: Simplify right side
   9,377.50x = 82,736,635.78
5. Step 5: Solve for x
   x = 82,736,635.78/9,377.50
6. Step 6: Final answer
   x = 8,822.89