Finding the Third Proportional to 318,171 and 693,150

Step by Step Solution

1. Step 1: Write the proportion equation
   318,171 : 693,150 = 693,150 : x
2. Step 2: Convert to fraction form
   318,171/693,150 = 693,150/x
3. Step 3: Cross multiply
   318,171x = 693,150 × 693,150
4. Step 4: Simplify right side
   318,171x = 480,456,922,500
5. Step 5: Solve for x
   x = 480,456,922,500/318,171
6. Step 6: Final answer
   x = 1,510,058.81