Finding the Fourth Proportional to 99.49, 148.59 and 72.35

Step by Step Solution

1. Step 1: Write the proportion equation
   99.49 : 148.59 = 72.35 : x
2. Step 2: Convert to fraction form
   99.49/148.59 = 72.35/x
3. Step 3: Cross multiply
   99.49x = 148.59 × 72.35
4. Step 4: Simplify right side
   99.49x = 10,750.49
5. Step 5: Solve for x
   x = 10,750.49/99.49
6. Step 6: Final answer
   x = 108.06