Finding the Fourth Proportional to 99.27, 136.98 and 57.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99.27 : 136.98 = 57.83 : x
2. Step 2: Convert to fraction form
   99.27/136.98 = 57.83/x
3. Step 3: Cross multiply
   99.27x = 136.98 × 57.83
4. Step 4: Simplify right side
   99.27x = 7,920.87
5. Step 5: Solve for x
   x = 7,920.87/99.27
6. Step 6: Final answer
   x = 79.79