Finding the Fourth Proportional to 2,520.42, 3,775.86 and 1,425.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.42 : 3,775.86 = 1,425.57 : x
2. Step 2: Convert to fraction form
   2,520.42/3,775.86 = 1,425.57/x
3. Step 3: Cross multiply
   2,520.42x = 3,775.86 × 1,425.57
4. Step 4: Simplify right side
   2,520.42x = 5,382,752.74
5. Step 5: Solve for x
   x = 5,382,752.74/2,520.42
6. Step 6: Final answer
   x = 2,135.66