Finding the Fourth Proportional to 72.74, 109.04 and 34.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72.74 : 109.04 = 34.18 : x
2. Step 2: Convert to fraction form
   72.74/109.04 = 34.18/x
3. Step 3: Cross multiply
   72.74x = 109.04 × 34.18
4. Step 4: Simplify right side
   72.74x = 3,726.54
5. Step 5: Solve for x
   x = 3,726.54/72.74
6. Step 6: Final answer
   x = 51.23