Finding the Third Proportional to 407,109 and 868,322

Step by Step Solution

1. Step 1: Write the proportion equation
   407,109 : 868,322 = 868,322 : x
2. Step 2: Convert to fraction form
   407,109/868,322 = 868,322/x
3. Step 3: Cross multiply
   407,109x = 868,322 × 868,322
4. Step 4: Simplify right side
   407,109x = 753,983,095,684
5. Step 5: Solve for x
   x = 753,983,095,684/407,109
6. Step 6: Final answer
   x = 1,852,042.32