Finding the Third Proportional to 622,891.69 and 890,728.31

Step by Step Solution

1. Step 1: Write the proportion equation
   622,891.69 : 890,728.31 = 890,728.31 : x
2. Step 2: Convert to fraction form
   622,891.69/890,728.31 = 890,728.31/x
3. Step 3: Cross multiply
   622,891.69x = 890,728.31 × 890,728.31
4. Step 4: Simplify right side
   622,891.69x = 793,396,926,689.10
5. Step 5: Solve for x
   x = 793,396,926,689.10/622,891.69
6. Step 6: Final answer
   x = 1,273,731.76