Finding the Fourth Proportional to 72.94, 109.31 and 34.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72.94 : 109.31 = 34.40 : x
2. Step 2: Convert to fraction form
   72.94/109.31 = 34.40/x
3. Step 3: Cross multiply
   72.94x = 109.31 × 34.40
4. Step 4: Simplify right side
   72.94x = 3,760.30
5. Step 5: Solve for x
   x = 3,760.30/72.94
6. Step 6: Final answer
   x = 51.55