Finding the Third Proportional to 125,359.50 and 261,087

Step by Step Solution

1. Step 1: Write the proportion equation
   125,359.50 : 261,087 = 261,087 : x
2. Step 2: Convert to fraction form
   125,359.50/261,087 = 261,087/x
3. Step 3: Cross multiply
   125,359.50x = 261,087 × 261,087
4. Step 4: Simplify right side
   125,359.50x = 68,166,421,569
5. Step 5: Solve for x
   x = 68,166,421,569/125,359.50
6. Step 6: Final answer
   x = 543,767.50