Finding the Fourth Proportional to 78.50, 108.27 and 53.93

Step by Step Solution

1. Step 1: Write the proportion equation
   78.50 : 108.27 = 53.93 : x
2. Step 2: Convert to fraction form
   78.50/108.27 = 53.93/x
3. Step 3: Cross multiply
   78.50x = 108.27 × 53.93
4. Step 4: Simplify right side
   78.50x = 5,838.46
5. Step 5: Solve for x
   x = 5,838.46/78.50
6. Step 6: Final answer
   x = 74.38