Finding the Fourth Proportional to 2,106.61, 2,908.10 and 1,222.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.61 : 2,908.10 = 1,222.24 : x
2. Step 2: Convert to fraction form
   2,106.61/2,908.10 = 1,222.24/x
3. Step 3: Cross multiply
   2,106.61x = 2,908.10 × 1,222.24
4. Step 4: Simplify right side
   2,106.61x = 3,554,397.38
5. Step 5: Solve for x
   x = 3,554,397.38/2,106.61
6. Step 6: Final answer
   x = 1,687.26