Finding the Fourth Proportional to 2,540.49, 3,505.94 and 1,421.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.49 : 3,505.94 = 1,421.42 : x
2. Step 2: Convert to fraction form
   2,540.49/3,505.94 = 1,421.42/x
3. Step 3: Cross multiply
   2,540.49x = 3,505.94 × 1,421.42
4. Step 4: Simplify right side
   2,540.49x = 4,983,416.79
5. Step 5: Solve for x
   x = 4,983,416.79/2,540.49
6. Step 6: Final answer
   x = 1,961.59