Finding the Fourth Proportional to 2,391.78, 3,280.06 and 2,292.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.78 : 3,280.06 = 2,292.00 : x
2. Step 2: Convert to fraction form
   2,391.78/3,280.06 = 2,292.00/x
3. Step 3: Cross multiply
   2,391.78x = 3,280.06 × 2,292.00
4. Step 4: Simplify right side
   2,391.78x = 7,517,888.08
5. Step 5: Solve for x
   x = 7,517,888.08/2,391.78
6. Step 6: Final answer
   x = 3,143.22