Finding the Third Proportional to 139,419 and 296,811

Step by Step Solution

1. Step 1: Write the proportion equation
   139,419 : 296,811 = 296,811 : x
2. Step 2: Convert to fraction form
   139,419/296,811 = 296,811/x
3. Step 3: Cross multiply
   139,419x = 296,811 × 296,811
4. Step 4: Simplify right side
   139,419x = 88,096,769,721
5. Step 5: Solve for x
   x = 88,096,769,721/139,419
6. Step 6: Final answer
   x = 631,884.96