Finding the Fourth Proportional to 2,520.28, 3,478.01 and 1,525.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.28 : 3,478.01 = 1,525.57 : x
2. Step 2: Convert to fraction form
   2,520.28/3,478.01 = 1,525.57/x
3. Step 3: Cross multiply
   2,520.28x = 3,478.01 × 1,525.57
4. Step 4: Simplify right side
   2,520.28x = 5,305,931.39
5. Step 5: Solve for x
   x = 5,305,931.39/2,520.28
6. Step 6: Final answer
   x = 2,105.29