Finding the Fourth Proportional to 109.10, 150.41 and 72.26

Step by Step Solution

1. Step 1: Write the proportion equation
   109.10 : 150.41 = 72.26 : x
2. Step 2: Convert to fraction form
   109.10/150.41 = 72.26/x
3. Step 3: Cross multiply
   109.10x = 150.41 × 72.26
4. Step 4: Simplify right side
   109.10x = 10,868.21
5. Step 5: Solve for x
   x = 10,868.21/109.10
6. Step 6: Final answer
   x = 99.62