Finding the Fourth Proportional to 100.72, 151.15 and 49.35

Step by Step Solution

1. Step 1: Write the proportion equation
   100.72 : 151.15 = 49.35 : x
2. Step 2: Convert to fraction form
   100.72/151.15 = 49.35/x
3. Step 3: Cross multiply
   100.72x = 151.15 × 49.35
4. Step 4: Simplify right side
   100.72x = 7,459.25
5. Step 5: Solve for x
   x = 7,459.25/100.72
6. Step 6: Final answer
   x = 74.06