Finding the Fourth Proportional to 1,146.59, 1,582.25 and 622.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.59 : 1,582.25 = 622.61 : x
2. Step 2: Convert to fraction form
   1,146.59/1,582.25 = 622.61/x
3. Step 3: Cross multiply
   1,146.59x = 1,582.25 × 622.61
4. Step 4: Simplify right side
   1,146.59x = 985,113.65
5. Step 5: Solve for x
   x = 985,113.65/1,146.59
6. Step 6: Final answer
   x = 859.17