Finding the Fourth Proportional to 109.06, 150.51 and 72.22

Step by Step Solution

1. Step 1: Write the proportion equation
   109.06 : 150.51 = 72.22 : x
2. Step 2: Convert to fraction form
   109.06/150.51 = 72.22/x
3. Step 3: Cross multiply
   109.06x = 150.51 × 72.22
4. Step 4: Simplify right side
   109.06x = 10,869.83
5. Step 5: Solve for x
   x = 10,869.83/109.06
6. Step 6: Final answer
   x = 99.67