Finding the Fourth Proportional to 2,540.79, 3,506.42 and 1,421.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.79 : 3,506.42 = 1,421.73 : x
2. Step 2: Convert to fraction form
   2,540.79/3,506.42 = 1,421.73/x
3. Step 3: Cross multiply
   2,540.79x = 3,506.42 × 1,421.73
4. Step 4: Simplify right side
   2,540.79x = 4,985,182.51
5. Step 5: Solve for x
   x = 4,985,182.51/2,540.79
6. Step 6: Final answer
   x = 1,962.06