Finding the Fourth Proportional to 2,626.45, 3,939.78 and 1,222.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.45 : 3,939.78 = 1,222.18 : x
2. Step 2: Convert to fraction form
   2,626.45/3,939.78 = 1,222.18/x
3. Step 3: Cross multiply
   2,626.45x = 3,939.78 × 1,222.18
4. Step 4: Simplify right side
   2,626.45x = 4,815,114.21
5. Step 5: Solve for x
   x = 4,815,114.21/2,626.45
6. Step 6: Final answer
   x = 1,833.32