Finding the Third Proportional to 261,943.88 and 400,434

Step by Step Solution

1. Step 1: Write the proportion equation
   261,943.88 : 400,434 = 400,434 : x
2. Step 2: Convert to fraction form
   261,943.88/400,434 = 400,434/x
3. Step 3: Cross multiply
   261,943.88x = 400,434 × 400,434
4. Step 4: Simplify right side
   261,943.88x = 160,347,388,356
5. Step 5: Solve for x
   x = 160,347,388,356/261,943.88
6. Step 6: Final answer
   x = 612,144.06