Finding the Fourth Proportional to 78.24, 108.03 and 53.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78.24 : 108.03 = 53.71 : x
2. Step 2: Convert to fraction form
   78.24/108.03 = 53.71/x
3. Step 3: Cross multiply
   78.24x = 108.03 × 53.71
4. Step 4: Simplify right side
   78.24x = 5,802.83
5. Step 5: Solve for x
   x = 5,802.83/78.24
6. Step 6: Final answer
   x = 74.17