Finding the Fourth Proportional to 2,217.26, 3,059.78 and 1,222.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.26 : 3,059.78 = 1,222.50 : x
2. Step 2: Convert to fraction form
   2,217.26/3,059.78 = 1,222.50/x
3. Step 3: Cross multiply
   2,217.26x = 3,059.78 × 1,222.50
4. Step 4: Simplify right side
   2,217.26x = 3,740,581.05
5. Step 5: Solve for x
   x = 3,740,581.05/2,217.26
6. Step 6: Final answer
   x = 1,687.03