Finding the Fourth Proportional to 78.78, 108.77 and 59.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78.78 : 108.77 = 59.52 : x
2. Step 2: Convert to fraction form
   78.78/108.77 = 59.52/x
3. Step 3: Cross multiply
   78.78x = 108.77 × 59.52
4. Step 4: Simplify right side
   78.78x = 6,473.69
5. Step 5: Solve for x
   x = 6,473.69/78.78
6. Step 6: Final answer
   x = 82.17