Finding the Third Proportional to 618,509 and 1,312,834

Step by Step Solution

1. Step 1: Write the proportion equation
   618,509 : 1,312,834 = 1,312,834 : x
2. Step 2: Convert to fraction form
   618,509/1,312,834 = 1,312,834/x
3. Step 3: Cross multiply
   618,509x = 1,312,834 × 1,312,834
4. Step 4: Simplify right side
   618,509x = 1,723,533,111,556
5. Step 5: Solve for x
   x = 1,723,533,111,556/618,509
6. Step 6: Final answer
   x = 2,786,593.42