Finding the Third Proportional to 218,986.50 and 472,155

Step by Step Solution

1. Step 1: Write the proportion equation
   218,986.50 : 472,155 = 472,155 : x
2. Step 2: Convert to fraction form
   218,986.50/472,155 = 472,155/x
3. Step 3: Cross multiply
   218,986.50x = 472,155 × 472,155
4. Step 4: Simplify right side
   218,986.50x = 222,930,344,025
5. Step 5: Solve for x
   x = 222,930,344,025/218,986.50
6. Step 6: Final answer
   x = 1,018,009.53