Finding the Third Proportional to 622,642.50 and 1,298,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   622,642.50 : 1,298,389.50 = 1,298,389.50 : x
2. Step 2: Convert to fraction form
   622,642.50/1,298,389.50 = 1,298,389.50/x
3. Step 3: Cross multiply
   622,642.50x = 1,298,389.50 × 1,298,389.50
4. Step 4: Simplify right side
   622,642.50x = 1,685,815,293,710.25
5. Step 5: Solve for x
   x = 1,685,815,293,710.25/622,642.50
6. Step 6: Final answer
   x = 2,707,517.22