Finding the Fourth Proportional to 1,146.30, 1,581.88 and 622.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.30 : 1,581.88 = 622.33 : x
2. Step 2: Convert to fraction form
   1,146.30/1,581.88 = 622.33/x
3. Step 3: Cross multiply
   1,146.30x = 1,581.88 × 622.33
4. Step 4: Simplify right side
   1,146.30x = 984,447.64
5. Step 5: Solve for x
   x = 984,447.64/1,146.30
6. Step 6: Final answer
   x = 858.81