Finding the Third Proportional to 379,042 and 816,404

Step by Step Solution

1. Step 1: Write the proportion equation
   379,042 : 816,404 = 816,404 : x
2. Step 2: Convert to fraction form
   379,042/816,404 = 816,404/x
3. Step 3: Cross multiply
   379,042x = 816,404 × 816,404
4. Step 4: Simplify right side
   379,042x = 666,515,491,216
5. Step 5: Solve for x
   x = 666,515,491,216/379,042
6. Step 6: Final answer
   x = 1,758,421.21