Finding the Fourth Proportional to 2,520.89, 3,477.90 and 1,525.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.89 : 3,477.90 = 1,525.80 : x
2. Step 2: Convert to fraction form
   2,520.89/3,477.90 = 1,525.80/x
3. Step 3: Cross multiply
   2,520.89x = 3,477.90 × 1,525.80
4. Step 4: Simplify right side
   2,520.89x = 5,306,579.82
5. Step 5: Solve for x
   x = 5,306,579.82/2,520.89
6. Step 6: Final answer
   x = 2,105.05