Finding the Fourth Proportional to 1,176.72, 1,765.30 and 483.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,176.72 : 1,765.30 = 483.78 : x
2. Step 2: Convert to fraction form
   1,176.72/1,765.30 = 483.78/x
3. Step 3: Cross multiply
   1,176.72x = 1,765.30 × 483.78
4. Step 4: Simplify right side
   1,176.72x = 854,016.83
5. Step 5: Solve for x
   x = 854,016.83/1,176.72
6. Step 6: Final answer
   x = 725.76