Finding the Fourth Proportional to 2,218.74, 3,061.89 and 1,224.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.74 : 3,061.89 = 1,224.06 : x
2. Step 2: Convert to fraction form
   2,218.74/3,061.89 = 1,224.06/x
3. Step 3: Cross multiply
   2,218.74x = 3,061.89 × 1,224.06
4. Step 4: Simplify right side
   2,218.74x = 3,747,937.07
5. Step 5: Solve for x
   x = 3,747,937.07/2,218.74
6. Step 6: Final answer
   x = 1,689.22