Finding the Third Proportional to 1,689,021 and 3,715,839

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689,021 : 3,715,839 = 3,715,839 : x
2. Step 2: Convert to fraction form
   1,689,021/3,715,839 = 3,715,839/x
3. Step 3: Cross multiply
   1,689,021x = 3,715,839 × 3,715,839
4. Step 4: Simplify right side
   1,689,021x = 13,807,459,473,921
5. Step 5: Solve for x
   x = 13,807,459,473,921/1,689,021
6. Step 6: Final answer
   x = 8,174,829.96