Finding the Third Proportional to 815,672 and 1,778,800

Step by Step Solution

1. Step 1: Write the proportion equation
   815,672 : 1,778,800 = 1,778,800 : x
2. Step 2: Convert to fraction form
   815,672/1,778,800 = 1,778,800/x
3. Step 3: Cross multiply
   815,672x = 1,778,800 × 1,778,800
4. Step 4: Simplify right side
   815,672x = 3,164,129,440,000
5. Step 5: Solve for x
   x = 3,164,129,440,000/815,672
6. Step 6: Final answer
   x = 3,879,168.88