Finding the Third Proportional to 400,650 and 816,141

Step by Step Solution

1. Step 1: Write the proportion equation
   400,650 : 816,141 = 816,141 : x
2. Step 2: Convert to fraction form
   400,650/816,141 = 816,141/x
3. Step 3: Cross multiply
   400,650x = 816,141 × 816,141
4. Step 4: Simplify right side
   400,650x = 666,086,131,881
5. Step 5: Solve for x
   x = 666,086,131,881/400,650
6. Step 6: Final answer
   x = 1,662,513.74