Finding the Fourth Proportional to 2,218.89, 3,062.05 and 1,224.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.89 : 3,062.05 = 1,224.15 : x
2. Step 2: Convert to fraction form
   2,218.89/3,062.05 = 1,224.15/x
3. Step 3: Cross multiply
   2,218.89x = 3,062.05 × 1,224.15
4. Step 4: Simplify right side
   2,218.89x = 3,748,400.85
5. Step 5: Solve for x
   x = 3,748,400.85/2,218.89
6. Step 6: Final answer
   x = 1,689.31