Finding the Third Proportional to 389,938.50 and 837,909

Step by Step Solution

1. Step 1: Write the proportion equation
   389,938.50 : 837,909 = 837,909 : x
2. Step 2: Convert to fraction form
   389,938.50/837,909 = 837,909/x
3. Step 3: Cross multiply
   389,938.50x = 837,909 × 837,909
4. Step 4: Simplify right side
   389,938.50x = 702,091,492,281
5. Step 5: Solve for x
   x = 702,091,492,281/389,938.50
6. Step 6: Final answer
   x = 1,800,518.52