Finding the Fourth Proportional to 72.87, 109.35 and 34.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72.87 : 109.35 = 34.32 : x
2. Step 2: Convert to fraction form
   72.87/109.35 = 34.32/x
3. Step 3: Cross multiply
   72.87x = 109.35 × 34.32
4. Step 4: Simplify right side
   72.87x = 3,752.89
5. Step 5: Solve for x
   x = 3,752.89/72.87
6. Step 6: Final answer
   x = 51.50