Finding the Third Proportional to 1,689,905 and 3,645,247

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689,905 : 3,645,247 = 3,645,247 : x
2. Step 2: Convert to fraction form
   1,689,905/3,645,247 = 3,645,247/x
3. Step 3: Cross multiply
   1,689,905x = 3,645,247 × 3,645,247
4. Step 4: Simplify right side
   1,689,905x = 13,287,825,691,009
5. Step 5: Solve for x
   x = 13,287,825,691,009/1,689,905
6. Step 6: Final answer
   x = 7,863,060.76