Finding the Fourth Proportional to 2,106.93, 2,906.85 and 1,222.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.93 : 2,906.85 = 1,222.41 : x
2. Step 2: Convert to fraction form
   2,106.93/2,906.85 = 1,222.41/x
3. Step 3: Cross multiply
   2,106.93x = 2,906.85 × 1,222.41
4. Step 4: Simplify right side
   2,106.93x = 3,553,362.51
5. Step 5: Solve for x
   x = 3,553,362.51/2,106.93
6. Step 6: Final answer
   x = 1,686.51