Finding the Fourth Proportional to 83.72, 115.37 and 68.22

Step by Step Solution

1. Step 1: Write the proportion equation
   83.72 : 115.37 = 68.22 : x
2. Step 2: Convert to fraction form
   83.72/115.37 = 68.22/x
3. Step 3: Cross multiply
   83.72x = 115.37 × 68.22
4. Step 4: Simplify right side
   83.72x = 7,870.54
5. Step 5: Solve for x
   x = 7,870.54/83.72
6. Step 6: Final answer
   x = 94.01