Finding the Third Proportional to 140,192 and 308,421

Step by Step Solution

1. Step 1: Write the proportion equation
   140,192 : 308,421 = 308,421 : x
2. Step 2: Convert to fraction form
   140,192/308,421 = 308,421/x
3. Step 3: Cross multiply
   140,192x = 308,421 × 308,421
4. Step 4: Simplify right side
   140,192x = 95,123,513,241
5. Step 5: Solve for x
   x = 95,123,513,241/140,192
6. Step 6: Final answer
   x = 678,523.12