Finding the Fourth Proportional to 72.62, 108.96 and 42.11

Step by Step Solution

1. Step 1: Write the proportion equation
   72.62 : 108.96 = 42.11 : x
2. Step 2: Convert to fraction form
   72.62/108.96 = 42.11/x
3. Step 3: Cross multiply
   72.62x = 108.96 × 42.11
4. Step 4: Simplify right side
   72.62x = 4,588.31
5. Step 5: Solve for x
   x = 4,588.31/72.62
6. Step 6: Final answer
   x = 63.18