Finding the Third Proportional to 1,788,112 and 3,878,978

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788,112 : 3,878,978 = 3,878,978 : x
2. Step 2: Convert to fraction form
   1,788,112/3,878,978 = 3,878,978/x
3. Step 3: Cross multiply
   1,788,112x = 3,878,978 × 3,878,978
4. Step 4: Simplify right side
   1,788,112x = 15,046,470,324,484
5. Step 5: Solve for x
   x = 15,046,470,324,484/1,788,112
6. Step 6: Final answer
   x = 8,414,724.76