Finding the Fourth Proportional to 2,218.11, 3,061.01 and 1,223.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.11 : 3,061.01 = 1,223.43 : x
2. Step 2: Convert to fraction form
   2,218.11/3,061.01 = 1,223.43/x
3. Step 3: Cross multiply
   2,218.11x = 3,061.01 × 1,223.43
4. Step 4: Simplify right side
   2,218.11x = 3,744,931.46
5. Step 5: Solve for x
   x = 3,744,931.46/2,218.11
6. Step 6: Final answer
   x = 1,688.34