Finding the Fourth Proportional to 72.84, 109.28 and 34.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72.84 : 109.28 = 34.34 : x
2. Step 2: Convert to fraction form
   72.84/109.28 = 34.34/x
3. Step 3: Cross multiply
   72.84x = 109.28 × 34.34
4. Step 4: Simplify right side
   72.84x = 3,753.03
5. Step 5: Solve for x
   x = 3,753.03/72.84
6. Step 6: Final answer
   x = 51.52