Finding the Fourth Proportional to 1,083.91, 1,626.15 and 434.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.91 : 1,626.15 = 434.83 : x
2. Step 2: Convert to fraction form
   1,083.91/1,626.15 = 434.83/x
3. Step 3: Cross multiply
   1,083.91x = 1,626.15 × 434.83
4. Step 4: Simplify right side
   1,083.91x = 707,098.80
5. Step 5: Solve for x
   x = 707,098.80/1,083.91
6. Step 6: Final answer
   x = 652.36