Finding the Fourth Proportional to 1,155.32, 1,731.16 and 634.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.32 : 1,731.16 = 634.88 : x
2. Step 2: Convert to fraction form
   1,155.32/1,731.16 = 634.88/x
3. Step 3: Cross multiply
   1,155.32x = 1,731.16 × 634.88
4. Step 4: Simplify right side
   1,155.32x = 1,099,078.86
5. Step 5: Solve for x
   x = 1,099,078.86/1,155.32
6. Step 6: Final answer
   x = 951.32