Finding the Fourth Proportional to 99.14, 148.37 and 72.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99.14 : 148.37 = 72.05 : x
2. Step 2: Convert to fraction form
   99.14/148.37 = 72.05/x
3. Step 3: Cross multiply
   99.14x = 148.37 × 72.05
4. Step 4: Simplify right side
   99.14x = 10,688.96
5. Step 5: Solve for x
   x = 10,688.96/99.14
6. Step 6: Final answer
   x = 107.82