Finding the Fourth Proportional to 109.14, 150.52 and 72.35

Step by Step Solution

1. Step 1: Write the proportion equation
   109.14 : 150.52 = 72.35 : x
2. Step 2: Convert to fraction form
   109.14/150.52 = 72.35/x
3. Step 3: Cross multiply
   109.14x = 150.52 × 72.35
4. Step 4: Simplify right side
   109.14x = 10,890.12
5. Step 5: Solve for x
   x = 10,890.12/109.14
6. Step 6: Final answer
   x = 99.78