Finding the Third Proportional to 30,658.50 and 65,508.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,658.50 : 65,508.75 = 65,508.75 : x
2. Step 2: Convert to fraction form
   30,658.50/65,508.75 = 65,508.75/x
3. Step 3: Cross multiply
   30,658.50x = 65,508.75 × 65,508.75
4. Step 4: Simplify right side
   30,658.50x = 4,291,396,326.56
5. Step 5: Solve for x
   x = 4,291,396,326.56/30,658.50
6. Step 6: Final answer
   x = 139,974.11