Finding the Third Proportional to 140,246 and 308,540

Step by Step Solution

1. Step 1: Write the proportion equation
   140,246 : 308,540 = 308,540 : x
2. Step 2: Convert to fraction form
   140,246/308,540 = 308,540/x
3. Step 3: Cross multiply
   140,246x = 308,540 × 308,540
4. Step 4: Simplify right side
   140,246x = 95,196,931,600
5. Step 5: Solve for x
   x = 95,196,931,600/140,246
6. Step 6: Final answer
   x = 678,785.36