Finding the Fourth Proportional to 3,715.59, 5,126.67 and 2,520.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.59 : 5,126.67 = 2,520.74 : x
2. Step 2: Convert to fraction form
   3,715.59/5,126.67 = 2,520.74/x
3. Step 3: Cross multiply
   3,715.59x = 5,126.67 × 2,520.74
4. Step 4: Simplify right side
   3,715.59x = 12,923,011.59
5. Step 5: Solve for x
   x = 12,923,011.59/3,715.59
6. Step 6: Final answer
   x = 3,478.05