Finding the Fourth Proportional to 2,218.97, 3,061.98 and 1,224.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.97 : 3,061.98 = 1,224.09 : x
2. Step 2: Convert to fraction form
   2,218.97/3,061.98 = 1,224.09/x
3. Step 3: Cross multiply
   2,218.97x = 3,061.98 × 1,224.09
4. Step 4: Simplify right side
   2,218.97x = 3,748,139.10
5. Step 5: Solve for x
   x = 3,748,139.10/2,218.97
6. Step 6: Final answer
   x = 1,689.14