Finding the Third Proportional to 218,886 and 471,517.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,886 : 471,517.50 = 471,517.50 : x
2. Step 2: Convert to fraction form
   218,886/471,517.50 = 471,517.50/x
3. Step 3: Cross multiply
   218,886x = 471,517.50 × 471,517.50
4. Step 4: Simplify right side
   218,886x = 222,328,752,806.25
5. Step 5: Solve for x
   x = 222,328,752,806.25/218,886
6. Step 6: Final answer
   x = 1,015,728.52