Finding the Third Proportional to 865,364 and 1,290,844

Step by Step Solution

1. Step 1: Write the proportion equation
   865,364 : 1,290,844 = 1,290,844 : x
2. Step 2: Convert to fraction form
   865,364/1,290,844 = 1,290,844/x
3. Step 3: Cross multiply
   865,364x = 1,290,844 × 1,290,844
4. Step 4: Simplify right side
   865,364x = 1,666,278,232,336
5. Step 5: Solve for x
   x = 1,666,278,232,336/865,364
6. Step 6: Final answer
   x = 1,925,522.94