Finding the Fourth Proportional to 78.42, 108.22 and 48.93

Step by Step Solution

1. Step 1: Write the proportion equation
   78.42 : 108.22 = 48.93 : x
2. Step 2: Convert to fraction form
   78.42/108.22 = 48.93/x
3. Step 3: Cross multiply
   78.42x = 108.22 × 48.93
4. Step 4: Simplify right side
   78.42x = 5,294.86
5. Step 5: Solve for x
   x = 5,294.86/78.42
6. Step 6: Final answer
   x = 67.52