Finding the Third Proportional to 1,862,109 and 3,989,979

Step by Step Solution

1. Step 1: Write the proportion equation
   1,862,109 : 3,989,979 = 3,989,979 : x
2. Step 2: Convert to fraction form
   1,862,109/3,989,979 = 3,989,979/x
3. Step 3: Cross multiply
   1,862,109x = 3,989,979 × 3,989,979
4. Step 4: Simplify right side
   1,862,109x = 15,919,932,420,441
5. Step 5: Solve for x
   x = 15,919,932,420,441/1,862,109
6. Step 6: Final answer
   x = 8,549,409.52