Finding the Fourth Proportional to 2,223.63, 3,068.78 and 1,292.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.63 : 3,068.78 = 1,292.31 : x
2. Step 2: Convert to fraction form
   2,223.63/3,068.78 = 1,292.31/x
3. Step 3: Cross multiply
   2,223.63x = 3,068.78 × 1,292.31
4. Step 4: Simplify right side
   2,223.63x = 3,965,802.97
5. Step 5: Solve for x
   x = 3,965,802.97/2,223.63
6. Step 6: Final answer
   x = 1,783.49