Finding the Third Proportional to 1,388,215 and 2,099,805

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,215 : 2,099,805 = 2,099,805 : x
2. Step 2: Convert to fraction form
   1,388,215/2,099,805 = 2,099,805/x
3. Step 3: Cross multiply
   1,388,215x = 2,099,805 × 2,099,805
4. Step 4: Simplify right side
   1,388,215x = 4,409,181,038,025
5. Step 5: Solve for x
   x = 4,409,181,038,025/1,388,215
6. Step 6: Final answer
   x = 3,176,151.42