Finding the Third Proportional to 218,680 and 473,630

Step by Step Solution

1. Step 1: Write the proportion equation
   218,680 : 473,630 = 473,630 : x
2. Step 2: Convert to fraction form
   218,680/473,630 = 473,630/x
3. Step 3: Cross multiply
   218,680x = 473,630 × 473,630
4. Step 4: Simplify right side
   218,680x = 224,325,376,900
5. Step 5: Solve for x
   x = 224,325,376,900/218,680
6. Step 6: Final answer
   x = 1,025,815.70