Finding the Fourth Proportional to 2,106.98, 2,907.59 and 1,222.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.98 : 2,907.59 = 1,222.76 : x
2. Step 2: Convert to fraction form
   2,106.98/2,907.59 = 1,222.76/x
3. Step 3: Cross multiply
   2,106.98x = 2,907.59 × 1,222.76
4. Step 4: Simplify right side
   2,106.98x = 3,555,284.75
5. Step 5: Solve for x
   x = 3,555,284.75/2,106.98
6. Step 6: Final answer
   x = 1,687.38