Finding the Third Proportional to 389,898 and 837,814.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,898 : 837,814.50 = 837,814.50 : x
2. Step 2: Convert to fraction form
   389,898/837,814.50 = 837,814.50/x
3. Step 3: Cross multiply
   389,898x = 837,814.50 × 837,814.50
4. Step 4: Simplify right side
   389,898x = 701,933,136,410.25
5. Step 5: Solve for x
   x = 701,933,136,410.25/389,898
6. Step 6: Final answer
   x = 1,800,299.40