Finding the Third Proportional to 623,722 and 1,312,642

Step by Step Solution

1. Step 1: Write the proportion equation
   623,722 : 1,312,642 = 1,312,642 : x
2. Step 2: Convert to fraction form
   623,722/1,312,642 = 1,312,642/x
3. Step 3: Cross multiply
   623,722x = 1,312,642 × 1,312,642
4. Step 4: Simplify right side
   623,722x = 1,723,029,020,164
5. Step 5: Solve for x
   x = 1,723,029,020,164/623,722
6. Step 6: Final answer
   x = 2,762,495.18