Finding the Third Proportional to 129,060.56 and 279,571.69

Step by Step Solution

1. Step 1: Write the proportion equation
   129,060.56 : 279,571.69 = 279,571.69 : x
2. Step 2: Convert to fraction form
   129,060.56/279,571.69 = 279,571.69/x
3. Step 3: Cross multiply
   129,060.56x = 279,571.69 × 279,571.69
4. Step 4: Simplify right side
   129,060.56x = 78,160,328,451.60
5. Step 5: Solve for x
   x = 78,160,328,451.60/129,060.56
6. Step 6: Final answer
   x = 605,609.70