Finding the Fourth Proportional to 99.73, 149.69 and 67.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99.73 : 149.69 = 67.12 : x
2. Step 2: Convert to fraction form
   99.73/149.69 = 67.12/x
3. Step 3: Cross multiply
   99.73x = 149.69 × 67.12
4. Step 4: Simplify right side
   99.73x = 10,047.40
5. Step 5: Solve for x
   x = 10,047.40/99.73
6. Step 6: Final answer
   x = 100.75