Finding the Fourth Proportional to 78.72, 108.76 and 59.44

Step by Step Solution

1. Step 1: Write the proportion equation
   78.72 : 108.76 = 59.44 : x
2. Step 2: Convert to fraction form
   78.72/108.76 = 59.44/x
3. Step 3: Cross multiply
   78.72x = 108.76 × 59.44
4. Step 4: Simplify right side
   78.72x = 6,464.69
5. Step 5: Solve for x
   x = 6,464.69/78.72
6. Step 6: Final answer
   x = 82.12