Finding the Fourth Proportional to 1,146.34, 1,581.94 and 622.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.34 : 1,581.94 = 622.38 : x
2. Step 2: Convert to fraction form
   1,146.34/1,581.94 = 622.38/x
3. Step 3: Cross multiply
   1,146.34x = 1,581.94 × 622.38
4. Step 4: Simplify right side
   1,146.34x = 984,567.82
5. Step 5: Solve for x
   x = 984,567.82/1,146.34
6. Step 6: Final answer
   x = 858.88