Finding the Third Proportional to 865,204 and 1,290,630

Step by Step Solution

1. Step 1: Write the proportion equation
   865,204 : 1,290,630 = 1,290,630 : x
2. Step 2: Convert to fraction form
   865,204/1,290,630 = 1,290,630/x
3. Step 3: Cross multiply
   865,204x = 1,290,630 × 1,290,630
4. Step 4: Simplify right side
   865,204x = 1,665,725,796,900
5. Step 5: Solve for x
   x = 1,665,725,796,900/865,204
6. Step 6: Final answer
   x = 1,925,240.52