Finding the Fourth Proportional to 2,118.39, 2,922.69 and 1,222.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.39 : 2,922.69 = 1,222.08 : x
2. Step 2: Convert to fraction form
   2,118.39/2,922.69 = 1,222.08/x
3. Step 3: Cross multiply
   2,118.39x = 2,922.69 × 1,222.08
4. Step 4: Simplify right side
   2,118.39x = 3,571,761.00
5. Step 5: Solve for x
   x = 3,571,761.00/2,118.39
6. Step 6: Final answer
   x = 1,686.07