Finding the Third Proportional to 217,490 and 479,130

Step by Step Solution

1. Step 1: Write the proportion equation
   217,490 : 479,130 = 479,130 : x
2. Step 2: Convert to fraction form
   217,490/479,130 = 479,130/x
3. Step 3: Cross multiply
   217,490x = 479,130 × 479,130
4. Step 4: Simplify right side
   217,490x = 229,565,556,900
5. Step 5: Solve for x
   x = 229,565,556,900/217,490
6. Step 6: Final answer
   x = 1,055,522.35