Finding the Third Proportional to 140,976 and 218,621.25

Step by Step Solution

1. Step 1: Write the proportion equation
   140,976 : 218,621.25 = 218,621.25 : x
2. Step 2: Convert to fraction form
   140,976/218,621.25 = 218,621.25/x
3. Step 3: Cross multiply
   140,976x = 218,621.25 × 218,621.25
4. Step 4: Simplify right side
   140,976x = 47,795,250,951.56
5. Step 5: Solve for x
   x = 47,795,250,951.56/140,976
6. Step 6: Final answer
   x = 339,031.12