Finding the Fourth Proportional to 2,218.69, 3,061.98 and 1,224.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.69 : 3,061.98 = 1,224.16 : x
2. Step 2: Convert to fraction form
   2,218.69/3,061.98 = 1,224.16/x
3. Step 3: Cross multiply
   2,218.69x = 3,061.98 × 1,224.16
4. Step 4: Simplify right side
   2,218.69x = 3,748,359.56
5. Step 5: Solve for x
   x = 3,748,359.56/2,218.69
6. Step 6: Final answer
   x = 1,689.45