Finding the Fourth Proportional to 2,106.70, 2,907.77 and 1,222.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.70 : 2,907.77 = 1,222.38 : x
2. Step 2: Convert to fraction form
   2,106.70/2,907.77 = 1,222.38/x
3. Step 3: Cross multiply
   2,106.70x = 2,907.77 × 1,222.38
4. Step 4: Simplify right side
   2,106.70x = 3,554,393.78
5. Step 5: Solve for x
   x = 3,554,393.78/2,106.70
6. Step 6: Final answer
   x = 1,687.19