Finding the Third Proportional to 200,918 and 429,799

Step by Step Solution

1. Step 1: Write the proportion equation
   200,918 : 429,799 = 429,799 : x
2. Step 2: Convert to fraction form
   200,918/429,799 = 429,799/x
3. Step 3: Cross multiply
   200,918x = 429,799 × 429,799
4. Step 4: Simplify right side
   200,918x = 184,727,180,401
5. Step 5: Solve for x
   x = 184,727,180,401/200,918
6. Step 6: Final answer
   x = 919,415.78