Finding the Fourth Proportional to 3,540.03, 4,885.29 and 2,142.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,540.03 : 4,885.29 = 2,142.78 : x
2. Step 2: Convert to fraction form
   3,540.03/4,885.29 = 2,142.78/x
3. Step 3: Cross multiply
   3,540.03x = 4,885.29 × 2,142.78
4. Step 4: Simplify right side
   3,540.03x = 10,468,101.71
5. Step 5: Solve for x
   x = 10,468,101.71/3,540.03
6. Step 6: Final answer
   x = 2,957.07