Finding the Fourth Proportional to 1,155.31, 1,594.33 and 631.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.31 : 1,594.33 = 631.34 : x
2. Step 2: Convert to fraction form
   1,155.31/1,594.33 = 631.34/x
3. Step 3: Cross multiply
   1,155.31x = 1,594.33 × 631.34
4. Step 4: Simplify right side
   1,155.31x = 1,006,573.25
5. Step 5: Solve for x
   x = 1,006,573.25/1,155.31
6. Step 6: Final answer
   x = 871.26