Finding the Fourth Proportional to 72.43, 108.56 and 53.14

Step by Step Solution

1. Step 1: Write the proportion equation
   72.43 : 108.56 = 53.14 : x
2. Step 2: Convert to fraction form
   72.43/108.56 = 53.14/x
3. Step 3: Cross multiply
   72.43x = 108.56 × 53.14
4. Step 4: Simplify right side
   72.43x = 5,768.74
5. Step 5: Solve for x
   x = 5,768.74/72.43
6. Step 6: Final answer
   x = 79.65