Finding the Fourth Proportional to 1,042.41, 1,438.57 and 622.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.41 : 1,438.57 = 622.83 : x
2. Step 2: Convert to fraction form
   1,042.41/1,438.57 = 622.83/x
3. Step 3: Cross multiply
   1,042.41x = 1,438.57 × 622.83
4. Step 4: Simplify right side
   1,042.41x = 895,984.55
5. Step 5: Solve for x
   x = 895,984.55/1,042.41
6. Step 6: Final answer
   x = 859.53