Finding the Third Proportional to 311,682.50 and 673,188

Step by Step Solution

1. Step 1: Write the proportion equation
   311,682.50 : 673,188 = 673,188 : x
2. Step 2: Convert to fraction form
   311,682.50/673,188 = 673,188/x
3. Step 3: Cross multiply
   311,682.50x = 673,188 × 673,188
4. Step 4: Simplify right side
   311,682.50x = 453,182,083,344
5. Step 5: Solve for x
   x = 453,182,083,344/311,682.50
6. Step 6: Final answer
   x = 1,453,986.29