Finding the Fourth Proportional to 1,155.91, 1,595.16 and 631.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.91 : 1,595.16 = 631.94 : x
2. Step 2: Convert to fraction form
   1,155.91/1,595.16 = 631.94/x
3. Step 3: Cross multiply
   1,155.91x = 1,595.16 × 631.94
4. Step 4: Simplify right side
   1,155.91x = 1,008,045.41
5. Step 5: Solve for x
   x = 1,008,045.41/1,155.91
6. Step 6: Final answer
   x = 872.08