Finding the Fourth Proportional to 72.37, 108.67 and 52.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72.37 : 108.67 = 52.17 : x
2. Step 2: Convert to fraction form
   72.37/108.67 = 52.17/x
3. Step 3: Cross multiply
   72.37x = 108.67 × 52.17
4. Step 4: Simplify right side
   72.37x = 5,669.03
5. Step 5: Solve for x
   x = 5,669.03/72.37
6. Step 6: Final answer
   x = 78.34