Finding the Fourth Proportional to 2,540.46, 3,505.81 and 1,421.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.46 : 3,505.81 = 1,421.40 : x
2. Step 2: Convert to fraction form
   2,540.46/3,505.81 = 1,421.40/x
3. Step 3: Cross multiply
   2,540.46x = 3,505.81 × 1,421.40
4. Step 4: Simplify right side
   2,540.46x = 4,983,158.33
5. Step 5: Solve for x
   x = 4,983,158.33/2,540.46
6. Step 6: Final answer
   x = 1,961.52