Finding the Fourth Proportional to 3,558.24, 4,909.50 and 2,142.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,558.24 : 4,909.50 = 2,142.18 : x
2. Step 2: Convert to fraction form
   3,558.24/4,909.50 = 2,142.18/x
3. Step 3: Cross multiply
   3,558.24x = 4,909.50 × 2,142.18
4. Step 4: Simplify right side
   3,558.24x = 10,517,032.71
5. Step 5: Solve for x
   x = 10,517,032.71/3,558.24
6. Step 6: Final answer
   x = 2,955.68