Finding the Fourth Proportional to 3,540.04, 4,885.30 and 2,142.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,540.04 : 4,885.30 = 2,142.78 : x
2. Step 2: Convert to fraction form
   3,540.04/4,885.30 = 2,142.78/x
3. Step 3: Cross multiply
   3,540.04x = 4,885.30 × 2,142.78
4. Step 4: Simplify right side
   3,540.04x = 10,468,123.13
5. Step 5: Solve for x
   x = 10,468,123.13/3,540.04
6. Step 6: Final answer
   x = 2,957.06