Finding the Third Proportional to 865,366 and 1,290,847

Step by Step Solution

1. Step 1: Write the proportion equation
   865,366 : 1,290,847 = 1,290,847 : x
2. Step 2: Convert to fraction form
   865,366/1,290,847 = 1,290,847/x
3. Step 3: Cross multiply
   865,366x = 1,290,847 × 1,290,847
4. Step 4: Simplify right side
   865,366x = 1,666,285,977,409
5. Step 5: Solve for x
   x = 1,666,285,977,409/865,366
6. Step 6: Final answer
   x = 1,925,527.44