Finding the Fourth Proportional to 2,217.72, 3,060.46 and 1,223

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.72 : 3,060.46 = 1,223 : x
2. Step 2: Convert to fraction form
   2,217.72/3,060.46 = 1,223/x
3. Step 3: Cross multiply
   2,217.72x = 3,060.46 × 1,223
4. Step 4: Simplify right side
   2,217.72x = 3,742,942.58
5. Step 5: Solve for x
   x = 3,742,942.58/2,217.72
6. Step 6: Final answer
   x = 1,687.74