Finding the Fourth Proportional to 2,222.32, 3,066.24 and 1,290.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.32 : 3,066.24 = 1,290.28 : x
2. Step 2: Convert to fraction form
   2,222.32/3,066.24 = 1,290.28/x
3. Step 3: Cross multiply
   2,222.32x = 3,066.24 × 1,290.28
4. Step 4: Simplify right side
   2,222.32x = 3,956,308.15
5. Step 5: Solve for x
   x = 3,956,308.15/2,222.32
6. Step 6: Final answer
   x = 1,780.26