Finding the Third Proportional to 269,809.31 and 389,797.31

Step by Step Solution

1. Step 1: Write the proportion equation
   269,809.31 : 389,797.31 = 389,797.31 : x
2. Step 2: Convert to fraction form
   269,809.31/389,797.31 = 389,797.31/x
3. Step 3: Cross multiply
   269,809.31x = 389,797.31 × 389,797.31
4. Step 4: Simplify right side
   269,809.31x = 151,941,944,832.22
5. Step 5: Solve for x
   x = 151,941,944,832.22/269,809.31
6. Step 6: Final answer
   x = 563,145.67