Finding the Fourth Proportional to 1,146.22, 1,581.78 and 622.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.22 : 1,581.78 = 622.25 : x
2. Step 2: Convert to fraction form
   1,146.22/1,581.78 = 622.25/x
3. Step 3: Cross multiply
   1,146.22x = 1,581.78 × 622.25
4. Step 4: Simplify right side
   1,146.22x = 984,259.49
5. Step 5: Solve for x
   x = 984,259.49/1,146.22
6. Step 6: Final answer
   x = 858.70