Finding the Third Proportional to 401,834 and 856,980

Step by Step Solution

1. Step 1: Write the proportion equation
   401,834 : 856,980 = 856,980 : x
2. Step 2: Convert to fraction form
   401,834/856,980 = 856,980/x
3. Step 3: Cross multiply
   401,834x = 856,980 × 856,980
4. Step 4: Simplify right side
   401,834x = 734,414,720,400
5. Step 5: Solve for x
   x = 734,414,720,400/401,834
6. Step 6: Final answer
   x = 1,827,656.99