Finding the Fourth Proportional to 78.95, 108.94 and 59.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78.95 : 108.94 = 59.30 : x
2. Step 2: Convert to fraction form
   78.95/108.94 = 59.30/x
3. Step 3: Cross multiply
   78.95x = 108.94 × 59.30
4. Step 4: Simplify right side
   78.95x = 6,460.27
5. Step 5: Solve for x
   x = 6,460.27/78.95
6. Step 6: Final answer
   x = 81.82