Finding the Third Proportional to 129,036 and 189,757.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,036 : 189,757.50 = 189,757.50 : x
2. Step 2: Convert to fraction form
   129,036/189,757.50 = 189,757.50/x
3. Step 3: Cross multiply
   129,036x = 189,757.50 × 189,757.50
4. Step 4: Simplify right side
   129,036x = 36,007,908,806.25
5. Step 5: Solve for x
   x = 36,007,908,806.25/129,036
6. Step 6: Final answer
   x = 279,053.20