Finding the Third Proportional to 1,689,911 and 3,645,259

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689,911 : 3,645,259 = 3,645,259 : x
2. Step 2: Convert to fraction form
   1,689,911/3,645,259 = 3,645,259/x
3. Step 3: Cross multiply
   1,689,911x = 3,645,259 × 3,645,259
4. Step 4: Simplify right side
   1,689,911x = 13,287,913,177,081
5. Step 5: Solve for x
   x = 13,287,913,177,081/1,689,911
6. Step 6: Final answer
   x = 7,863,084.61