Finding the Third Proportional to 865,176 and 1,290,588

Step by Step Solution

1. Step 1: Write the proportion equation
   865,176 : 1,290,588 = 1,290,588 : x
2. Step 2: Convert to fraction form
   865,176/1,290,588 = 1,290,588/x
3. Step 3: Cross multiply
   865,176x = 1,290,588 × 1,290,588
4. Step 4: Simplify right side
   865,176x = 1,665,617,385,744
5. Step 5: Solve for x
   x = 1,665,617,385,744/865,176
6. Step 6: Final answer
   x = 1,925,177.52