Finding the Third Proportional to 43.31 and 72.84

Step by Step Solution

1. Step 1: Write the proportion equation
   43.31 : 72.84 = 72.84 : x
2. Step 2: Convert to fraction form
   43.31/72.84 = 72.84/x
3. Step 3: Cross multiply
   43.31x = 72.84 × 72.84
4. Step 4: Simplify right side
   43.31x = 5,306.21
5. Step 5: Solve for x
   x = 5,306.21/43.31
6. Step 6: Final answer
   x = 122.51