Finding the Fourth Proportional to 2,290.78, 3,414.29 and 2,223.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.78 : 3,414.29 = 2,223.95 : x
2. Step 2: Convert to fraction form
   2,290.78/3,414.29 = 2,223.95/x
3. Step 3: Cross multiply
   2,290.78x = 3,414.29 × 2,223.95
4. Step 4: Simplify right side
   2,290.78x = 7,593,210.25
5. Step 5: Solve for x
   x = 7,593,210.25/2,290.78
6. Step 6: Final answer
   x = 3,314.69