Finding the Fourth Proportional to 1,155.80, 1,595.01 and 631.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.80 : 1,595.01 = 631.83 : x
2. Step 2: Convert to fraction form
   1,155.80/1,595.01 = 631.83/x
3. Step 3: Cross multiply
   1,155.80x = 1,595.01 × 631.83
4. Step 4: Simplify right side
   1,155.80x = 1,007,775.17
5. Step 5: Solve for x
   x = 1,007,775.17/1,155.80
6. Step 6: Final answer
   x = 871.93