Finding the Third Proportional to 408,945 and 838,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,945 : 838,288.50 = 838,288.50 : x
2. Step 2: Convert to fraction form
   408,945/838,288.50 = 838,288.50/x
3. Step 3: Cross multiply
   408,945x = 838,288.50 × 838,288.50
4. Step 4: Simplify right side
   408,945x = 702,727,609,232.25
5. Step 5: Solve for x
   x = 702,727,609,232.25/408,945
6. Step 6: Final answer
   x = 1,718,391.49