Finding the Fourth Proportional to 78.79, 108.77 and 52.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78.79 : 108.77 = 52.58 : x
2. Step 2: Convert to fraction form
   78.79/108.77 = 52.58/x
3. Step 3: Cross multiply
   78.79x = 108.77 × 52.58
4. Step 4: Simplify right side
   78.79x = 5,718.32
5. Step 5: Solve for x
   x = 5,718.32/78.79
6. Step 6: Final answer
   x = 72.58