Finding the Fourth Proportional to 1,525.10, 2,140.90 and 1,525.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.10 : 2,140.90 = 1,525.10 : x
2. Step 2: Convert to fraction form
   1,525.10/2,140.90 = 1,525.10/x
3. Step 3: Cross multiply
   1,525.10x = 2,140.90 × 1,525.10
4. Step 4: Simplify right side
   1,525.10x = 3,265,086.59
5. Step 5: Solve for x
   x = 3,265,086.59/1,525.10
6. Step 6: Final answer
   x = 2,140.90