Finding the Third Proportional to 638,838 and 1,407,301.31

Step by Step Solution

1. Step 1: Write the proportion equation
   638,838 : 1,407,301.31 = 1,407,301.31 : x
2. Step 2: Convert to fraction form
   638,838/1,407,301.31 = 1,407,301.31/x
3. Step 3: Cross multiply
   638,838x = 1,407,301.31 × 1,407,301.31
4. Step 4: Simplify right side
   638,838x = 1,980,496,984,164.22
5. Step 5: Solve for x
   x = 1,980,496,984,164.22/638,838
6. Step 6: Final answer
   x = 3,100,155.26