Finding the Fourth Proportional to 1,155.48, 1,594.60 and 631.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.48 : 1,594.60 = 631.51 : x
2. Step 2: Convert to fraction form
   1,155.48/1,594.60 = 631.51/x
3. Step 3: Cross multiply
   1,155.48x = 1,594.60 × 631.51
4. Step 4: Simplify right side
   1,155.48x = 1,006,994.72
5. Step 5: Solve for x
   x = 1,006,994.72/1,155.48
6. Step 6: Final answer
   x = 871.50