Finding the Fourth Proportional to 72.62, 100.11 and 50.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72.62 : 100.11 = 50.72 : x
2. Step 2: Convert to fraction form
   72.62/100.11 = 50.72/x
3. Step 3: Cross multiply
   72.62x = 100.11 × 50.72
4. Step 4: Simplify right side
   72.62x = 5,077.58
5. Step 5: Solve for x
   x = 5,077.58/72.62
6. Step 6: Final answer
   x = 69.92