Finding the Third Proportional to 129,808.50 and 281,760

Step by Step Solution

1. Step 1: Write the proportion equation
   129,808.50 : 281,760 = 281,760 : x
2. Step 2: Convert to fraction form
   129,808.50/281,760 = 281,760/x
3. Step 3: Cross multiply
   129,808.50x = 281,760 × 281,760
4. Step 4: Simplify right side
   129,808.50x = 79,388,697,600
5. Step 5: Solve for x
   x = 79,388,697,600/129,808.50
6. Step 6: Final answer
   x = 611,583.20