Finding the Fourth Proportional to 1,155.56, 1,594.68 and 631.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.56 : 1,594.68 = 631.59 : x
2. Step 2: Convert to fraction form
   1,155.56/1,594.68 = 631.59/x
3. Step 3: Cross multiply
   1,155.56x = 1,594.68 × 631.59
4. Step 4: Simplify right side
   1,155.56x = 1,007,183.94
5. Step 5: Solve for x
   x = 1,007,183.94/1,155.56
6. Step 6: Final answer
   x = 871.60