Finding the Fourth Proportional to 78.28, 108.06 and 50.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78.28 : 108.06 = 50.62 : x
2. Step 2: Convert to fraction form
   78.28/108.06 = 50.62/x
3. Step 3: Cross multiply
   78.28x = 108.06 × 50.62
4. Step 4: Simplify right side
   78.28x = 5,470.00
5. Step 5: Solve for x
   x = 5,470.00/78.28
6. Step 6: Final answer
   x = 69.88