Finding the Fourth Proportional to 2,502.57, 3,453.72 and 1,440.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,502.57 : 3,453.72 = 1,440.51 : x
2. Step 2: Convert to fraction form
   2,502.57/3,453.72 = 1,440.51/x
3. Step 3: Cross multiply
   2,502.57x = 3,453.72 × 1,440.51
4. Step 4: Simplify right side
   2,502.57x = 4,975,118.20
5. Step 5: Solve for x
   x = 4,975,118.20/2,502.57
6. Step 6: Final answer
   x = 1,988.00