Finding the Fourth Proportional to 1,155.34, 1,594.38 and 631.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.34 : 1,594.38 = 631.38 : x
2. Step 2: Convert to fraction form
   1,155.34/1,594.38 = 631.38/x
3. Step 3: Cross multiply
   1,155.34x = 1,594.38 × 631.38
4. Step 4: Simplify right side
   1,155.34x = 1,006,659.64
5. Step 5: Solve for x
   x = 1,006,659.64/1,155.34
6. Step 6: Final answer
   x = 871.31