Finding the Third Proportional to 315,970 and 693,166

Step by Step Solution

1. Step 1: Write the proportion equation
   315,970 : 693,166 = 693,166 : x
2. Step 2: Convert to fraction form
   315,970/693,166 = 693,166/x
3. Step 3: Cross multiply
   315,970x = 693,166 × 693,166
4. Step 4: Simplify right side
   315,970x = 480,479,103,556
5. Step 5: Solve for x
   x = 480,479,103,556/315,970
6. Step 6: Final answer
   x = 1,520,647.86