Finding the Fourth Proportional to 72.89, 109.31 and 34.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72.89 : 109.31 = 34.36 : x
2. Step 2: Convert to fraction form
   72.89/109.31 = 34.36/x
3. Step 3: Cross multiply
   72.89x = 109.31 × 34.36
4. Step 4: Simplify right side
   72.89x = 3,755.51
5. Step 5: Solve for x
   x = 3,755.51/72.89
6. Step 6: Final answer
   x = 51.53