Finding the Fourth Proportional to 72.82, 109.05 and 53.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72.82 : 109.05 = 53.62 : x
2. Step 2: Convert to fraction form
   72.82/109.05 = 53.62/x
3. Step 3: Cross multiply
   72.82x = 109.05 × 53.62
4. Step 4: Simplify right side
   72.82x = 5,847.26
5. Step 5: Solve for x
   x = 5,847.26/72.82
6. Step 6: Final answer
   x = 80.30