Finding the Fourth Proportional to 2,221.28, 3,066.47 and 1,382.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.28 : 3,066.47 = 1,382.25 : x
2. Step 2: Convert to fraction form
   2,221.28/3,066.47 = 1,382.25/x
3. Step 3: Cross multiply
   2,221.28x = 3,066.47 × 1,382.25
4. Step 4: Simplify right side
   2,221.28x = 4,238,645.70
5. Step 5: Solve for x
   x = 4,238,645.70/2,221.28
6. Step 6: Final answer
   x = 1,908.20