Finding the Third Proportional to 543,978 and 838,804

Step by Step Solution

1. Step 1: Write the proportion equation
   543,978 : 838,804 = 838,804 : x
2. Step 2: Convert to fraction form
   543,978/838,804 = 838,804/x
3. Step 3: Cross multiply
   543,978x = 838,804 × 838,804
4. Step 4: Simplify right side
   543,978x = 703,592,150,416
5. Step 5: Solve for x
   x = 703,592,150,416/543,978
6. Step 6: Final answer
   x = 1,293,420.23