Finding the Fourth Proportional to 109.32, 150.71 and 72.46

Step by Step Solution

1. Step 1: Write the proportion equation
   109.32 : 150.71 = 72.46 : x
2. Step 2: Convert to fraction form
   109.32/150.71 = 72.46/x
3. Step 3: Cross multiply
   109.32x = 150.71 × 72.46
4. Step 4: Simplify right side
   109.32x = 10,920.68
5. Step 5: Solve for x
   x = 10,920.68/109.32
6. Step 6: Final answer
   x = 99.90