Finding the Fourth Proportional to 2,829.18, 4,225.89 and 2,391.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,829.18 : 4,225.89 = 2,391.78 : x
2. Step 2: Convert to fraction form
   2,829.18/4,225.89 = 2,391.78/x
3. Step 3: Cross multiply
   2,829.18x = 4,225.89 × 2,391.78
4. Step 4: Simplify right side
   2,829.18x = 10,107,399.18
5. Step 5: Solve for x
   x = 10,107,399.18/2,829.18
6. Step 6: Final answer
   x = 3,572.55