Finding the Fourth Proportional to 109.12, 150.75 and 72.37

Step by Step Solution

1. Step 1: Write the proportion equation
   109.12 : 150.75 = 72.37 : x
2. Step 2: Convert to fraction form
   109.12/150.75 = 72.37/x
3. Step 3: Cross multiply
   109.12x = 150.75 × 72.37
4. Step 4: Simplify right side
   109.12x = 10,909.78
5. Step 5: Solve for x
   x = 10,909.78/109.12
6. Step 6: Final answer
   x = 99.98