Finding the Fourth Proportional to 111.63, 167.37 and 65.91

Step by Step Solution

1. Step 1: Write the proportion equation
   111.63 : 167.37 = 65.91 : x
2. Step 2: Convert to fraction form
   111.63/167.37 = 65.91/x
3. Step 3: Cross multiply
   111.63x = 167.37 × 65.91
4. Step 4: Simplify right side
   111.63x = 11,031.74
5. Step 5: Solve for x
   x = 11,031.74/111.63
6. Step 6: Final answer
   x = 98.83