Finding the Fourth Proportional to 72.89, 109.34 and 34.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72.89 : 109.34 = 34.35 : x
2. Step 2: Convert to fraction form
   72.89/109.34 = 34.35/x
3. Step 3: Cross multiply
   72.89x = 109.34 × 34.35
4. Step 4: Simplify right side
   72.89x = 3,755.66
5. Step 5: Solve for x
   x = 3,755.66/72.89
6. Step 6: Final answer
   x = 51.53