Finding the Fourth Proportional to 82.16, 122.69 and 73.51

Step by Step Solution

1. Step 1: Write the proportion equation
   82.16 : 122.69 = 73.51 : x
2. Step 2: Convert to fraction form
   82.16/122.69 = 73.51/x
3. Step 3: Cross multiply
   82.16x = 122.69 × 73.51
4. Step 4: Simplify right side
   82.16x = 9,018.61
5. Step 5: Solve for x
   x = 9,018.61/82.16
6. Step 6: Final answer
   x = 109.76