Finding the Third Proportional to 394,321.50 and 861,615

Step by Step Solution

1. Step 1: Write the proportion equation
   394,321.50 : 861,615 = 861,615 : x
2. Step 2: Convert to fraction form
   394,321.50/861,615 = 861,615/x
3. Step 3: Cross multiply
   394,321.50x = 861,615 × 861,615
4. Step 4: Simplify right side
   394,321.50x = 742,380,408,225
5. Step 5: Solve for x
   x = 742,380,408,225/394,321.50
6. Step 6: Final answer
   x = 1,882,677.99