Finding the Third Proportional to 129,610.13 and 300,241.69

Step by Step Solution

1. Step 1: Write the proportion equation
   129,610.13 : 300,241.69 = 300,241.69 : x
2. Step 2: Convert to fraction form
   129,610.13/300,241.69 = 300,241.69/x
3. Step 3: Cross multiply
   129,610.13x = 300,241.69 × 300,241.69
4. Step 4: Simplify right side
   129,610.13x = 90,145,070,912.85
5. Step 5: Solve for x
   x = 90,145,070,912.85/129,610.13
6. Step 6: Final answer
   x = 695,509.48