Finding the Third Proportional to 472,440 and 717,404

Step by Step Solution

1. Step 1: Write the proportion equation
   472,440 : 717,404 = 717,404 : x
2. Step 2: Convert to fraction form
   472,440/717,404 = 717,404/x
3. Step 3: Cross multiply
   472,440x = 717,404 × 717,404
4. Step 4: Simplify right side
   472,440x = 514,668,499,216
5. Step 5: Solve for x
   x = 514,668,499,216/472,440
6. Step 6: Final answer
   x = 1,089,383.84