Finding the Fourth Proportional to 72.82, 109.15 and 34.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72.82 : 109.15 = 34.28 : x
2. Step 2: Convert to fraction form
   72.82/109.15 = 34.28/x
3. Step 3: Cross multiply
   72.82x = 109.15 × 34.28
4. Step 4: Simplify right side
   72.82x = 3,741.66
5. Step 5: Solve for x
   x = 3,741.66/72.82
6. Step 6: Final answer
   x = 51.38