Finding the Fourth Proportional to 1,155.39, 1,594.43 and 631.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.39 : 1,594.43 = 631.42 : x
2. Step 2: Convert to fraction form
   1,155.39/1,594.43 = 631.42/x
3. Step 3: Cross multiply
   1,155.39x = 1,594.43 × 631.42
4. Step 4: Simplify right side
   1,155.39x = 1,006,743.86
5. Step 5: Solve for x
   x = 1,006,743.86/1,155.39
6. Step 6: Final answer
   x = 871.35