Finding the Third Proportional to 319,145.50 and 472,556

Step by Step Solution

1. Step 1: Write the proportion equation
   319,145.50 : 472,556 = 472,556 : x
2. Step 2: Convert to fraction form
   319,145.50/472,556 = 472,556/x
3. Step 3: Cross multiply
   319,145.50x = 472,556 × 472,556
4. Step 4: Simplify right side
   319,145.50x = 223,309,173,136
5. Step 5: Solve for x
   x = 223,309,173,136/319,145.50
6. Step 6: Final answer
   x = 699,709.61