Finding the Fourth Proportional to 99.42, 137.12 and 73.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99.42 : 137.12 = 73.28 : x
2. Step 2: Convert to fraction form
   99.42/137.12 = 73.28/x
3. Step 3: Cross multiply
   99.42x = 137.12 × 73.28
4. Step 4: Simplify right side
   99.42x = 10,048.15
5. Step 5: Solve for x
   x = 10,048.15/99.42
6. Step 6: Final answer
   x = 101.07