Finding the Third Proportional to 218,988 and 472,158

Step by Step Solution

1. Step 1: Write the proportion equation
   218,988 : 472,158 = 472,158 : x
2. Step 2: Convert to fraction form
   218,988/472,158 = 472,158/x
3. Step 3: Cross multiply
   218,988x = 472,158 × 472,158
4. Step 4: Simplify right side
   218,988x = 222,933,176,964
5. Step 5: Solve for x
   x = 222,933,176,964/218,988
6. Step 6: Final answer
   x = 1,018,015.49