Finding the Fourth Proportional to 2,179.12, 3,007.14 and 1,222.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.12 : 3,007.14 = 1,222.04 : x
2. Step 2: Convert to fraction form
   2,179.12/3,007.14 = 1,222.04/x
3. Step 3: Cross multiply
   2,179.12x = 3,007.14 × 1,222.04
4. Step 4: Simplify right side
   2,179.12x = 3,674,845.37
5. Step 5: Solve for x
   x = 3,674,845.37/2,179.12
6. Step 6: Final answer
   x = 1,686.39