Finding the Third Proportional to 542,943 and 819,978

Step by Step Solution

1. Step 1: Write the proportion equation
   542,943 : 819,978 = 819,978 : x
2. Step 2: Convert to fraction form
   542,943/819,978 = 819,978/x
3. Step 3: Cross multiply
   542,943x = 819,978 × 819,978
4. Step 4: Simplify right side
   542,943x = 672,363,920,484
5. Step 5: Solve for x
   x = 672,363,920,484/542,943
6. Step 6: Final answer
   x = 1,238,369.26