Finding the Third Proportional to 261,945.56 and 400,435.31

Step by Step Solution

1. Step 1: Write the proportion equation
   261,945.56 : 400,435.31 = 400,435.31 : x
2. Step 2: Convert to fraction form
   261,945.56/400,435.31 = 400,435.31/x
3. Step 3: Cross multiply
   261,945.56x = 400,435.31 × 400,435.31
4. Step 4: Simplify right side
   261,945.56x = 160,348,439,496.97
5. Step 5: Solve for x
   x = 160,348,439,496.97/261,945.56
6. Step 6: Final answer
   x = 612,144.13