Finding the Third Proportional to 876,858 and 1,315,409

Step by Step Solution

1. Step 1: Write the proportion equation
   876,858 : 1,315,409 = 1,315,409 : x
2. Step 2: Convert to fraction form
   876,858/1,315,409 = 1,315,409/x
3. Step 3: Cross multiply
   876,858x = 1,315,409 × 1,315,409
4. Step 4: Simplify right side
   876,858x = 1,730,300,837,281
5. Step 5: Solve for x
   x = 1,730,300,837,281/876,858
6. Step 6: Final answer
   x = 1,973,296.52