Finding the Fourth Proportional to 78.94, 108.96 and 52.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78.94 : 108.96 = 52.76 : x
2. Step 2: Convert to fraction form
   78.94/108.96 = 52.76/x
3. Step 3: Cross multiply
   78.94x = 108.96 × 52.76
4. Step 4: Simplify right side
   78.94x = 5,748.18
5. Step 5: Solve for x
   x = 5,748.18/78.94
6. Step 6: Final answer
   x = 72.82