Finding the Third Proportional to 776,342 and 1,689,372

Step by Step Solution

1. Step 1: Write the proportion equation
   776,342 : 1,689,372 = 1,689,372 : x
2. Step 2: Convert to fraction form
   776,342/1,689,372 = 1,689,372/x
3. Step 3: Cross multiply
   776,342x = 1,689,372 × 1,689,372
4. Step 4: Simplify right side
   776,342x = 2,853,977,754,384
5. Step 5: Solve for x
   x = 2,853,977,754,384/776,342
6. Step 6: Final answer
   x = 3,676,186.21