Finding the Third Proportional to 129,966 and 279,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,966 : 279,271.50 = 279,271.50 : x
2. Step 2: Convert to fraction form
   129,966/279,271.50 = 279,271.50/x
3. Step 3: Cross multiply
   129,966x = 279,271.50 × 279,271.50
4. Step 4: Simplify right side
   129,966x = 77,992,570,712.25
5. Step 5: Solve for x
   x = 77,992,570,712.25/129,966
6. Step 6: Final answer
   x = 600,099.80