Finding the Fourth Proportional to 99.49, 149.01 and 72.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99.49 : 149.01 = 72.38 : x
2. Step 2: Convert to fraction form
   99.49/149.01 = 72.38/x
3. Step 3: Cross multiply
   99.49x = 149.01 × 72.38
4. Step 4: Simplify right side
   99.49x = 10,785.34
5. Step 5: Solve for x
   x = 10,785.34/99.49
6. Step 6: Final answer
   x = 108.41