Finding the Third Proportional to 30,311 and 65,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,311 : 65,868.50 = 65,868.50 : x
2. Step 2: Convert to fraction form
   30,311/65,868.50 = 65,868.50/x
3. Step 3: Cross multiply
   30,311x = 65,868.50 × 65,868.50
4. Step 4: Simplify right side
   30,311x = 4,338,659,292.25
5. Step 5: Solve for x
   x = 4,338,659,292.25/30,311
6. Step 6: Final answer
   x = 143,138.11