Finding the Fourth Proportional to 13,520.79, 18,658.76 and 7,552.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,520.79 : 18,658.76 = 7,552.71 : x
2. Step 2: Convert to fraction form
   13,520.79/18,658.76 = 7,552.71/x
3. Step 3: Cross multiply
   13,520.79x = 18,658.76 × 7,552.71
4. Step 4: Simplify right side
   13,520.79x = 140,924,165.48
5. Step 5: Solve for x
   x = 140,924,165.48/13,520.79
6. Step 6: Final answer
   x = 10,422.78