Finding the Fourth Proportional to 109.35, 150.88 and 72.00

Step by Step Solution

1. Step 1: Write the proportion equation
   109.35 : 150.88 = 72.00 : x
2. Step 2: Convert to fraction form
   109.35/150.88 = 72.00/x
3. Step 3: Cross multiply
   109.35x = 150.88 × 72.00
4. Step 4: Simplify right side
   109.35x = 10,863.56
5. Step 5: Solve for x
   x = 10,863.56/109.35
6. Step 6: Final answer
   x = 99.35