Finding the Fourth Proportional to 59.99, 82.77 and 57.86

Step by Step Solution

1. Step 1: Write the proportion equation
   59.99 : 82.77 = 57.86 : x
2. Step 2: Convert to fraction form
   59.99/82.77 = 57.86/x
3. Step 3: Cross multiply
   59.99x = 82.77 × 57.86
4. Step 4: Simplify right side
   59.99x = 4,789.54
5. Step 5: Solve for x
   x = 4,789.54/59.99
6. Step 6: Final answer
   x = 79.84