Finding the Third Proportional to 239,865 and 555,358.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,865 : 555,358.50 = 555,358.50 : x
2. Step 2: Convert to fraction form
   239,865/555,358.50 = 555,358.50/x
3. Step 3: Cross multiply
   239,865x = 555,358.50 × 555,358.50
4. Step 4: Simplify right side
   239,865x = 308,423,063,522.25
5. Step 5: Solve for x
   x = 308,423,063,522.25/239,865
6. Step 6: Final answer
   x = 1,285,819.37