Finding the Fourth Proportional to 2,223.78, 3,068.85 and 1,229.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.78 : 3,068.85 = 1,229.15 : x
2. Step 2: Convert to fraction form
   2,223.78/3,068.85 = 1,229.15/x
3. Step 3: Cross multiply
   2,223.78x = 3,068.85 × 1,229.15
4. Step 4: Simplify right side
   2,223.78x = 3,772,076.98
5. Step 5: Solve for x
   x = 3,772,076.98/2,223.78
6. Step 6: Final answer
   x = 1,696.25