Finding the Third Proportional to 308,638.69 and 673,096.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,638.69 : 673,096.50 = 673,096.50 : x
2. Step 2: Convert to fraction form
   308,638.69/673,096.50 = 673,096.50/x
3. Step 3: Cross multiply
   308,638.69x = 673,096.50 × 673,096.50
4. Step 4: Simplify right side
   308,638.69x = 453,058,898,312.25
5. Step 5: Solve for x
   x = 453,058,898,312.25/308,638.69
6. Step 6: Final answer
   x = 1,467,926.47