Finding the Fourth Proportional to 109.34, 150.84 and 72.48

Step by Step Solution

1. Step 1: Write the proportion equation
   109.34 : 150.84 = 72.48 : x
2. Step 2: Convert to fraction form
   109.34/150.84 = 72.48/x
3. Step 3: Cross multiply
   109.34x = 150.84 × 72.48
4. Step 4: Simplify right side
   109.34x = 10,932.88
5. Step 5: Solve for x
   x = 10,932.88/109.34
6. Step 6: Final answer
   x = 99.99