Finding the Fourth Proportional to 2,106.11, 2,906.42 and 1,222.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.11 : 2,906.42 = 1,222.43 : x
2. Step 2: Convert to fraction form
   2,106.11/2,906.42 = 1,222.43/x
3. Step 3: Cross multiply
   2,106.11x = 2,906.42 × 1,222.43
4. Step 4: Simplify right side
   2,106.11x = 3,552,895.00
5. Step 5: Solve for x
   x = 3,552,895.00/2,106.11
6. Step 6: Final answer
   x = 1,686.95