Finding the Third Proportional to 218,378 and 475,216

Step by Step Solution

1. Step 1: Write the proportion equation
   218,378 : 475,216 = 475,216 : x
2. Step 2: Convert to fraction form
   218,378/475,216 = 475,216/x
3. Step 3: Cross multiply
   218,378x = 475,216 × 475,216
4. Step 4: Simplify right side
   218,378x = 225,830,246,656
5. Step 5: Solve for x
   x = 225,830,246,656/218,378
6. Step 6: Final answer
   x = 1,034,125.45