Finding the Fourth Proportional to 9,672.90, 14,520.15 and 5,288.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,672.90 : 14,520.15 = 5,288.10 : x
2. Step 2: Convert to fraction form
   9,672.90/14,520.15 = 5,288.10/x
3. Step 3: Cross multiply
   9,672.90x = 14,520.15 × 5,288.10
4. Step 4: Simplify right side
   9,672.90x = 76,784,005.22
5. Step 5: Solve for x
   x = 76,784,005.22/9,672.90
6. Step 6: Final answer
   x = 7,938.05