Finding the Third Proportional to 128,666.75 and 283,510

Step by Step Solution

1. Step 1: Write the proportion equation
   128,666.75 : 283,510 = 283,510 : x
2. Step 2: Convert to fraction form
   128,666.75/283,510 = 283,510/x
3. Step 3: Cross multiply
   128,666.75x = 283,510 × 283,510
4. Step 4: Simplify right side
   128,666.75x = 80,377,920,100
5. Step 5: Solve for x
   x = 80,377,920,100/128,666.75
6. Step 6: Final answer
   x = 624,698.46