Finding the Fourth Proportional to 1,155.38, 1,594.37 and 631.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.38 : 1,594.37 = 631.31 : x
2. Step 2: Convert to fraction form
   1,155.38/1,594.37 = 631.31/x
3. Step 3: Cross multiply
   1,155.38x = 1,594.37 × 631.31
4. Step 4: Simplify right side
   1,155.38x = 1,006,538.57
5. Step 5: Solve for x
   x = 1,006,538.57/1,155.38
6. Step 6: Final answer
   x = 871.18