Finding the Fourth Proportional to 72.46, 108.72 and 43.63

Step by Step Solution

1. Step 1: Write the proportion equation
   72.46 : 108.72 = 43.63 : x
2. Step 2: Convert to fraction form
   72.46/108.72 = 43.63/x
3. Step 3: Cross multiply
   72.46x = 108.72 × 43.63
4. Step 4: Simplify right side
   72.46x = 4,742.69
5. Step 5: Solve for x
   x = 4,742.69/72.46
6. Step 6: Final answer
   x = 65.46