Finding the Third Proportional to 120,330 and 259,314.75

Step by Step Solution

1. Step 1: Write the proportion equation
   120,330 : 259,314.75 = 259,314.75 : x
2. Step 2: Convert to fraction form
   120,330/259,314.75 = 259,314.75/x
3. Step 3: Cross multiply
   120,330x = 259,314.75 × 259,314.75
4. Step 4: Simplify right side
   120,330x = 67,244,139,567.56
5. Step 5: Solve for x
   x = 67,244,139,567.56/120,330
6. Step 6: Final answer
   x = 558,831.04