Finding the Third Proportional to 129,015 and 303,561.75

Step by Step Solution

1. Step 1: Write the proportion equation
   129,015 : 303,561.75 = 303,561.75 : x
2. Step 2: Convert to fraction form
   129,015/303,561.75 = 303,561.75/x
3. Step 3: Cross multiply
   129,015x = 303,561.75 × 303,561.75
4. Step 4: Simplify right side
   129,015x = 92,149,736,063.06
5. Step 5: Solve for x
   x = 92,149,736,063.06/129,015
6. Step 6: Final answer
   x = 714,255.99