Finding the Third Proportional to 30.31 and 61.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30.31 : 61.56 = 61.56 : x
2. Step 2: Convert to fraction form
   30.31/61.56 = 61.56/x
3. Step 3: Cross multiply
   30.31x = 61.56 × 61.56
4. Step 4: Simplify right side
   30.31x = 3,789.94
5. Step 5: Solve for x
   x = 3,789.94/30.31
6. Step 6: Final answer
   x = 125.03