Finding the Fourth Proportional to 1,155.80, 1,595.02 and 631.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.80 : 1,595.02 = 631.82 : x
2. Step 2: Convert to fraction form
   1,155.80/1,595.02 = 631.82/x
3. Step 3: Cross multiply
   1,155.80x = 1,595.02 × 631.82
4. Step 4: Simplify right side
   1,155.80x = 1,007,765.54
5. Step 5: Solve for x
   x = 1,007,765.54/1,155.80
6. Step 6: Final answer
   x = 871.92