Finding the Fourth Proportional to 1,155.63, 1,594.71 and 631.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.63 : 1,594.71 = 631.56 : x
2. Step 2: Convert to fraction form
   1,155.63/1,594.71 = 631.56/x
3. Step 3: Cross multiply
   1,155.63x = 1,594.71 × 631.56
4. Step 4: Simplify right side
   1,155.63x = 1,007,155.05
5. Step 5: Solve for x
   x = 1,007,155.05/1,155.63
6. Step 6: Final answer
   x = 871.52