Finding the Fourth Proportional to 2,211.89, 3,052.43 and 1,217.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211.89 : 3,052.43 = 1,217.18 : x
2. Step 2: Convert to fraction form
   2,211.89/3,052.43 = 1,217.18/x
3. Step 3: Cross multiply
   2,211.89x = 3,052.43 × 1,217.18
4. Step 4: Simplify right side
   2,211.89x = 3,715,335.40
5. Step 5: Solve for x
   x = 3,715,335.40/2,211.89
6. Step 6: Final answer
   x = 1,679.71