Finding the Fourth Proportional to 72.52, 108.76 and 31.94

Step by Step Solution

1. Step 1: Write the proportion equation
   72.52 : 108.76 = 31.94 : x
2. Step 2: Convert to fraction form
   72.52/108.76 = 31.94/x
3. Step 3: Cross multiply
   72.52x = 108.76 × 31.94
4. Step 4: Simplify right side
   72.52x = 3,473.79
5. Step 5: Solve for x
   x = 3,473.79/72.52
6. Step 6: Final answer
   x = 47.90