Finding the Fourth Proportional to 1,155.89, 1,595.11 and 631.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.89 : 1,595.11 = 631.92 : x
2. Step 2: Convert to fraction form
   1,155.89/1,595.11 = 631.92/x
3. Step 3: Cross multiply
   1,155.89x = 1,595.11 × 631.92
4. Step 4: Simplify right side
   1,155.89x = 1,007,981.91
5. Step 5: Solve for x
   x = 1,007,981.91/1,155.89
6. Step 6: Final answer
   x = 872.04