Finding the Third Proportional to 30,168 and 64,939.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,168 : 64,939.50 = 64,939.50 : x
2. Step 2: Convert to fraction form
   30,168/64,939.50 = 64,939.50/x
3. Step 3: Cross multiply
   30,168x = 64,939.50 × 64,939.50
4. Step 4: Simplify right side
   30,168x = 4,217,138,660.25
5. Step 5: Solve for x
   x = 4,217,138,660.25/30,168
6. Step 6: Final answer
   x = 139,788.47