Finding the Third Proportional to 261,515.25 and 404,098.88

Step by Step Solution

1. Step 1: Write the proportion equation
   261,515.25 : 404,098.88 = 404,098.88 : x
2. Step 2: Convert to fraction form
   261,515.25/404,098.88 = 404,098.88/x
3. Step 3: Cross multiply
   261,515.25x = 404,098.88 × 404,098.88
4. Step 4: Simplify right side
   261,515.25x = 163,295,900,776.27
5. Step 5: Solve for x
   x = 163,295,900,776.27/261,515.25
6. Step 6: Final answer
   x = 624,422.10