Finding the Fourth Proportional to 1,155.24, 1,732.98 and 425.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.24 : 1,732.98 = 425.34 : x
2. Step 2: Convert to fraction form
   1,155.24/1,732.98 = 425.34/x
3. Step 3: Cross multiply
   1,155.24x = 1,732.98 × 425.34
4. Step 4: Simplify right side
   1,155.24x = 737,105.71
5. Step 5: Solve for x
   x = 737,105.71/1,155.24
6. Step 6: Final answer
   x = 638.05