Finding the Fourth Proportional to 99.06, 148.59 and 72.06

Step by Step Solution

1. Step 1: Write the proportion equation
   99.06 : 148.59 = 72.06 : x
2. Step 2: Convert to fraction form
   99.06/148.59 = 72.06/x
3. Step 3: Cross multiply
   99.06x = 148.59 × 72.06
4. Step 4: Simplify right side
   99.06x = 10,707.40
5. Step 5: Solve for x
   x = 10,707.40/99.06
6. Step 6: Final answer
   x = 108.09