Finding the Fourth Proportional to 1,155.88, 1,595.13 and 631.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.88 : 1,595.13 = 631.91 : x
2. Step 2: Convert to fraction form
   1,155.88/1,595.13 = 631.91/x
3. Step 3: Cross multiply
   1,155.88x = 1,595.13 × 631.91
4. Step 4: Simplify right side
   1,155.88x = 1,007,978.60
5. Step 5: Solve for x
   x = 1,007,978.60/1,155.88
6. Step 6: Final answer
   x = 872.04