Finding the Fourth Proportional to 78.76, 108.70 and 52.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78.76 : 108.70 = 52.52 : x
2. Step 2: Convert to fraction form
   78.76/108.70 = 52.52/x
3. Step 3: Cross multiply
   78.76x = 108.70 × 52.52
4. Step 4: Simplify right side
   78.76x = 5,709.20
5. Step 5: Solve for x
   x = 5,709.20/78.76
6. Step 6: Final answer
   x = 72.49