Finding the Third Proportional to 541,978 and 805,105

Step by Step Solution

1. Step 1: Write the proportion equation
   541,978 : 805,105 = 805,105 : x
2. Step 2: Convert to fraction form
   541,978/805,105 = 805,105/x
3. Step 3: Cross multiply
   541,978x = 805,105 × 805,105
4. Step 4: Simplify right side
   541,978x = 648,194,061,025
5. Step 5: Solve for x
   x = 648,194,061,025/541,978
6. Step 6: Final answer
   x = 1,195,978.55