Finding the Third Proportional to 140,760 and 207,216

Step by Step Solution

1. Step 1: Write the proportion equation
   140,760 : 207,216 = 207,216 : x
2. Step 2: Convert to fraction form
   140,760/207,216 = 207,216/x
3. Step 3: Cross multiply
   140,760x = 207,216 × 207,216
4. Step 4: Simplify right side
   140,760x = 42,938,470,656
5. Step 5: Solve for x
   x = 42,938,470,656/140,760
6. Step 6: Final answer
   x = 305,047.39