Finding the Fourth Proportional to 2,540.52, 3,505.78 and 1,421.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.52 : 3,505.78 = 1,421.24 : x
2. Step 2: Convert to fraction form
   2,540.52/3,505.78 = 1,421.24/x
3. Step 3: Cross multiply
   2,540.52x = 3,505.78 × 1,421.24
4. Step 4: Simplify right side
   2,540.52x = 4,982,554.77
5. Step 5: Solve for x
   x = 4,982,554.77/2,540.52
6. Step 6: Final answer
   x = 1,961.23