Finding the Fourth Proportional to 78.47, 108.22 and 50.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78.47 : 108.22 = 50.83 : x
2. Step 2: Convert to fraction form
   78.47/108.22 = 50.83/x
3. Step 3: Cross multiply
   78.47x = 108.22 × 50.83
4. Step 4: Simplify right side
   78.47x = 5,500.42
5. Step 5: Solve for x
   x = 5,500.42/78.47
6. Step 6: Final answer
   x = 70.09