Finding the Third Proportional to 1,689,907 and 3,645,251

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689,907 : 3,645,251 = 3,645,251 : x
2. Step 2: Convert to fraction form
   1,689,907/3,645,251 = 3,645,251/x
3. Step 3: Cross multiply
   1,689,907x = 3,645,251 × 3,645,251
4. Step 4: Simplify right side
   1,689,907x = 13,287,854,853,001
5. Step 5: Solve for x
   x = 13,287,854,853,001/1,689,907
6. Step 6: Final answer
   x = 7,863,068.71