Finding the Third Proportional to 539,289 and 838,363.50

Step by Step Solution

1. Step 1: Write the proportion equation
   539,289 : 838,363.50 = 838,363.50 : x
2. Step 2: Convert to fraction form
   539,289/838,363.50 = 838,363.50/x
3. Step 3: Cross multiply
   539,289x = 838,363.50 × 838,363.50
4. Step 4: Simplify right side
   539,289x = 702,853,358,132.25
5. Step 5: Solve for x
   x = 702,853,358,132.25/539,289
6. Step 6: Final answer
   x = 1,303,296.30