Finding the Third Proportional to 30,861 and 68,141.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,861 : 68,141.25 = 68,141.25 : x
2. Step 2: Convert to fraction form
   30,861/68,141.25 = 68,141.25/x
3. Step 3: Cross multiply
   30,861x = 68,141.25 × 68,141.25
4. Step 4: Simplify right side
   30,861x = 4,643,229,951.56
5. Step 5: Solve for x
   x = 4,643,229,951.56/30,861
6. Step 6: Final answer
   x = 150,456.24