Finding the Fourth Proportional to 72.37, 108.63 and 52.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72.37 : 108.63 = 52.12 : x
2. Step 2: Convert to fraction form
   72.37/108.63 = 52.12/x
3. Step 3: Cross multiply
   72.37x = 108.63 × 52.12
4. Step 4: Simplify right side
   72.37x = 5,661.80
5. Step 5: Solve for x
   x = 5,661.80/72.37
6. Step 6: Final answer
   x = 78.23