Finding the Fourth Proportional to 2,218.84, 3,061.98 and 1,224.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.84 : 3,061.98 = 1,224.13 : x
2. Step 2: Convert to fraction form
   2,218.84/3,061.98 = 1,224.13/x
3. Step 3: Cross multiply
   2,218.84x = 3,061.98 × 1,224.13
4. Step 4: Simplify right side
   2,218.84x = 3,748,246.27
5. Step 5: Solve for x
   x = 3,748,246.27/2,218.84
6. Step 6: Final answer
   x = 1,689.28