Finding the Fourth Proportional to 78.48, 108.33 and 53.97

Step by Step Solution

1. Step 1: Write the proportion equation
   78.48 : 108.33 = 53.97 : x
2. Step 2: Convert to fraction form
   78.48/108.33 = 53.97/x
3. Step 3: Cross multiply
   78.48x = 108.33 × 53.97
4. Step 4: Simplify right side
   78.48x = 5,846.57
5. Step 5: Solve for x
   x = 5,846.57/78.48
6. Step 6: Final answer
   x = 74.50