Finding the Third Proportional to 400,185 and 610,443

Step by Step Solution

1. Step 1: Write the proportion equation
   400,185 : 610,443 = 610,443 : x
2. Step 2: Convert to fraction form
   400,185/610,443 = 610,443/x
3. Step 3: Cross multiply
   400,185x = 610,443 × 610,443
4. Step 4: Simplify right side
   400,185x = 372,640,656,249
5. Step 5: Solve for x
   x = 372,640,656,249/400,185
6. Step 6: Final answer
   x = 931,170.97