Finding the Fourth Proportional to 2,217.86, 3,060.63 and 1,223.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.86 : 3,060.63 = 1,223.18 : x
2. Step 2: Convert to fraction form
   2,217.86/3,060.63 = 1,223.18/x
3. Step 3: Cross multiply
   2,217.86x = 3,060.63 × 1,223.18
4. Step 4: Simplify right side
   2,217.86x = 3,743,695.29
5. Step 5: Solve for x
   x = 3,743,695.29/2,217.86
6. Step 6: Final answer
   x = 1,687.98