Finding the Fourth Proportional to 2,217.67, 3,060.25 and 1,222.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.67 : 3,060.25 = 1,222.74 : x
2. Step 2: Convert to fraction form
   2,217.67/3,060.25 = 1,222.74/x
3. Step 3: Cross multiply
   2,217.67x = 3,060.25 × 1,222.74
4. Step 4: Simplify right side
   2,217.67x = 3,741,887.03
5. Step 5: Solve for x
   x = 3,741,887.03/2,217.67
6. Step 6: Final answer
   x = 1,687.31