Finding the Fourth Proportional to 2,218.18, 3,061.08 and 1,223.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.18 : 3,061.08 = 1,223.41 : x
2. Step 2: Convert to fraction form
   2,218.18/3,061.08 = 1,223.41/x
3. Step 3: Cross multiply
   2,218.18x = 3,061.08 × 1,223.41
4. Step 4: Simplify right side
   2,218.18x = 3,744,955.88
5. Step 5: Solve for x
   x = 3,744,955.88/2,218.18
6. Step 6: Final answer
   x = 1,688.30