Finding the Third Proportional to 876,408 and 1,311,109

Step by Step Solution

1. Step 1: Write the proportion equation
   876,408 : 1,311,109 = 1,311,109 : x
2. Step 2: Convert to fraction form
   876,408/1,311,109 = 1,311,109/x
3. Step 3: Cross multiply
   876,408x = 1,311,109 × 1,311,109
4. Step 4: Simplify right side
   876,408x = 1,719,006,809,881
5. Step 5: Solve for x
   x = 1,719,006,809,881/876,408
6. Step 6: Final answer
   x = 1,961,423.00