Finding the Fourth Proportional to 2,540.24, 3,505.52 and 1,421.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.24 : 3,505.52 = 1,421.17 : x
2. Step 2: Convert to fraction form
   2,540.24/3,505.52 = 1,421.17/x
3. Step 3: Cross multiply
   2,540.24x = 3,505.52 × 1,421.17
4. Step 4: Simplify right side
   2,540.24x = 4,981,939.86
5. Step 5: Solve for x
   x = 4,981,939.86/2,540.24
6. Step 6: Final answer
   x = 1,961.21