Finding the Third Proportional to 129,459.94 and 276,910.31

Step by Step Solution

1. Step 1: Write the proportion equation
   129,459.94 : 276,910.31 = 276,910.31 : x
2. Step 2: Convert to fraction form
   129,459.94/276,910.31 = 276,910.31/x
3. Step 3: Cross multiply
   129,459.94x = 276,910.31 × 276,910.31
4. Step 4: Simplify right side
   129,459.94x = 76,679,321,168.85
5. Step 5: Solve for x
   x = 76,679,321,168.85/129,459.94
6. Step 6: Final answer
   x = 592,301.55