Finding the Fourth Proportional to 1,146.25, 1,581.83 and 622.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.25 : 1,581.83 = 622.28 : x
2. Step 2: Convert to fraction form
   1,146.25/1,581.83 = 622.28/x
3. Step 3: Cross multiply
   1,146.25x = 1,581.83 × 622.28
4. Step 4: Simplify right side
   1,146.25x = 984,341.17
5. Step 5: Solve for x
   x = 984,341.17/1,146.25
6. Step 6: Final answer
   x = 858.75