Finding the Fourth Proportional to 2,217.47, 3,060.10 and 1,222.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.47 : 3,060.10 = 1,222.81 : x
2. Step 2: Convert to fraction form
   2,217.47/3,060.10 = 1,222.81/x
3. Step 3: Cross multiply
   2,217.47x = 3,060.10 × 1,222.81
4. Step 4: Simplify right side
   2,217.47x = 3,741,914.76
5. Step 5: Solve for x
   x = 3,741,914.76/2,217.47
6. Step 6: Final answer
   x = 1,687.47