Finding the Third Proportional to 218,954 and 472,090

Step by Step Solution

1. Step 1: Write the proportion equation
   218,954 : 472,090 = 472,090 : x
2. Step 2: Convert to fraction form
   218,954/472,090 = 472,090/x
3. Step 3: Cross multiply
   218,954x = 472,090 × 472,090
4. Step 4: Simplify right side
   218,954x = 222,868,968,100
5. Step 5: Solve for x
   x = 222,868,968,100/218,954
6. Step 6: Final answer
   x = 1,017,880.32