Finding the Fourth Proportional to 1,155.84, 1,595.06 and 631.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.84 : 1,595.06 = 631.87 : x
2. Step 2: Convert to fraction form
   1,155.84/1,595.06 = 631.87/x
3. Step 3: Cross multiply
   1,155.84x = 1,595.06 × 631.87
4. Step 4: Simplify right side
   1,155.84x = 1,007,872.56
5. Step 5: Solve for x
   x = 1,007,872.56/1,155.84
6. Step 6: Final answer
   x = 871.98