Finding the Third Proportional to 259,239 and 392,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   259,239 : 392,479.50 = 392,479.50 : x
2. Step 2: Convert to fraction form
   259,239/392,479.50 = 392,479.50/x
3. Step 3: Cross multiply
   259,239x = 392,479.50 × 392,479.50
4. Step 4: Simplify right side
   259,239x = 154,040,157,920.25
5. Step 5: Solve for x
   x = 154,040,157,920.25/259,239
6. Step 6: Final answer
   x = 594,201.33