Finding the Fourth Proportional to 72.76, 108.86 and 52.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72.76 : 108.86 = 52.52 : x
2. Step 2: Convert to fraction form
   72.76/108.86 = 52.52/x
3. Step 3: Cross multiply
   72.76x = 108.86 × 52.52
4. Step 4: Simplify right side
   72.76x = 5,717.33
5. Step 5: Solve for x
   x = 5,717.33/72.76
6. Step 6: Final answer
   x = 78.58