Finding the Fourth Proportional to 2,106.27, 2,906.60 and 1,222.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.27 : 2,906.60 = 1,222.16 : x
2. Step 2: Convert to fraction form
   2,106.27/2,906.60 = 1,222.16/x
3. Step 3: Cross multiply
   2,106.27x = 2,906.60 × 1,222.16
4. Step 4: Simplify right side
   2,106.27x = 3,552,309.61
5. Step 5: Solve for x
   x = 3,552,309.61/2,106.27
6. Step 6: Final answer
   x = 1,686.54