Finding the Third Proportional to 1,355,678 and 1,988,205

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355,678 : 1,988,205 = 1,988,205 : x
2. Step 2: Convert to fraction form
   1,355,678/1,988,205 = 1,988,205/x
3. Step 3: Cross multiply
   1,355,678x = 1,988,205 × 1,988,205
4. Step 4: Simplify right side
   1,355,678x = 3,952,959,122,025
5. Step 5: Solve for x
   x = 3,952,959,122,025/1,355,678
6. Step 6: Final answer
   x = 2,915,854.00