Finding the Third Proportional to 140,308.50 and 212,718

Step by Step Solution

1. Step 1: Write the proportion equation
   140,308.50 : 212,718 = 212,718 : x
2. Step 2: Convert to fraction form
   140,308.50/212,718 = 212,718/x
3. Step 3: Cross multiply
   140,308.50x = 212,718 × 212,718
4. Step 4: Simplify right side
   140,308.50x = 45,248,947,524
5. Step 5: Solve for x
   x = 45,248,947,524/140,308.50
6. Step 6: Final answer
   x = 322,496.12