Finding the Third Proportional to 418,112 and 890,164

Step by Step Solution

1. Step 1: Write the proportion equation
   418,112 : 890,164 = 890,164 : x
2. Step 2: Convert to fraction form
   418,112/890,164 = 890,164/x
3. Step 3: Cross multiply
   418,112x = 890,164 × 890,164
4. Step 4: Simplify right side
   418,112x = 792,391,946,896
5. Step 5: Solve for x
   x = 792,391,946,896/418,112
6. Step 6: Final answer
   x = 1,895,166.72