Finding the Fourth Proportional to 2,617.25, 3,926.57 and 1,520.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.25 : 3,926.57 = 1,520.57 : x
2. Step 2: Convert to fraction form
   2,617.25/3,926.57 = 1,520.57/x
3. Step 3: Cross multiply
   2,617.25x = 3,926.57 × 1,520.57
4. Step 4: Simplify right side
   2,617.25x = 5,970,597.31
5. Step 5: Solve for x
   x = 5,970,597.31/2,617.25
6. Step 6: Final answer
   x = 2,281.25