Finding the Fourth Proportional to 1,155.32, 1,594.31 and 631.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.32 : 1,594.31 = 631.35 : x
2. Step 2: Convert to fraction form
   1,155.32/1,594.31 = 631.35/x
3. Step 3: Cross multiply
   1,155.32x = 1,594.31 × 631.35
4. Step 4: Simplify right side
   1,155.32x = 1,006,564.46
5. Step 5: Solve for x
   x = 1,006,564.46/1,155.32
6. Step 6: Final answer
   x = 871.25