Finding the Fourth Proportional to 2,223.99, 3,069.06 and 1,229.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.99 : 3,069.06 = 1,229.31 : x
2. Step 2: Convert to fraction form
   2,223.99/3,069.06 = 1,229.31/x
3. Step 3: Cross multiply
   2,223.99x = 3,069.06 × 1,229.31
4. Step 4: Simplify right side
   2,223.99x = 3,772,826.15
5. Step 5: Solve for x
   x = 3,772,826.15/2,223.99
6. Step 6: Final answer
   x = 1,696.42