Finding the Third Proportional to 311,697 and 671,061

Step by Step Solution

1. Step 1: Write the proportion equation
   311,697 : 671,061 = 671,061 : x
2. Step 2: Convert to fraction form
   311,697/671,061 = 671,061/x
3. Step 3: Cross multiply
   311,697x = 671,061 × 671,061
4. Step 4: Simplify right side
   311,697x = 450,322,865,721
5. Step 5: Solve for x
   x = 450,322,865,721/311,697
6. Step 6: Final answer
   x = 1,444,745.59