Finding the Third Proportional to 218,620 and 471,680

Step by Step Solution

1. Step 1: Write the proportion equation
   218,620 : 471,680 = 471,680 : x
2. Step 2: Convert to fraction form
   218,620/471,680 = 471,680/x
3. Step 3: Cross multiply
   218,620x = 471,680 × 471,680
4. Step 4: Simplify right side
   218,620x = 222,482,022,400
5. Step 5: Solve for x
   x = 222,482,022,400/218,620
6. Step 6: Final answer
   x = 1,017,665.46