Finding the Third Proportional to 218,980 and 472,136

Step by Step Solution

1. Step 1: Write the proportion equation
   218,980 : 472,136 = 472,136 : x
2. Step 2: Convert to fraction form
   218,980/472,136 = 472,136/x
3. Step 3: Cross multiply
   218,980x = 472,136 × 472,136
4. Step 4: Simplify right side
   218,980x = 222,912,402,496
5. Step 5: Solve for x
   x = 222,912,402,496/218,980
6. Step 6: Final answer
   x = 1,017,957.82