Finding the Fourth Proportional to 73.72, 111.22 and 69.92

Step by Step Solution

1. Step 1: Write the proportion equation
   73.72 : 111.22 = 69.92 : x
2. Step 2: Convert to fraction form
   73.72/111.22 = 69.92/x
3. Step 3: Cross multiply
   73.72x = 111.22 × 69.92
4. Step 4: Simplify right side
   73.72x = 7,776.50
5. Step 5: Solve for x
   x = 7,776.50/73.72
6. Step 6: Final answer
   x = 105.49