Finding the Fourth Proportional to 2,223.32, 3,068.15 and 1,228.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.32 : 3,068.15 = 1,228.57 : x
2. Step 2: Convert to fraction form
   2,223.32/3,068.15 = 1,228.57/x
3. Step 3: Cross multiply
   2,223.32x = 3,068.15 × 1,228.57
4. Step 4: Simplify right side
   2,223.32x = 3,769,423.23
5. Step 5: Solve for x
   x = 3,769,423.23/2,223.32
6. Step 6: Final answer
   x = 1,695.41