Finding the Fourth Proportional to 111.86, 167.77 and 51.01

Step by Step Solution

1. Step 1: Write the proportion equation
   111.86 : 167.77 = 51.01 : x
2. Step 2: Convert to fraction form
   111.86/167.77 = 51.01/x
3. Step 3: Cross multiply
   111.86x = 167.77 × 51.01
4. Step 4: Simplify right side
   111.86x = 8,556.85
5. Step 5: Solve for x
   x = 8,556.85/111.86
6. Step 6: Final answer
   x = 76.50