Finding the Fourth Proportional to 2,217.92, 3,060.76 and 1,223.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.92 : 3,060.76 = 1,223.24 : x
2. Step 2: Convert to fraction form
   2,217.92/3,060.76 = 1,223.24/x
3. Step 3: Cross multiply
   2,217.92x = 3,060.76 × 1,223.24
4. Step 4: Simplify right side
   2,217.92x = 3,744,044.06
5. Step 5: Solve for x
   x = 3,744,044.06/2,217.92
6. Step 6: Final answer
   x = 1,688.09