Finding the Third Proportional to 129,181.50 and 189,945

Step by Step Solution

1. Step 1: Write the proportion equation
   129,181.50 : 189,945 = 189,945 : x
2. Step 2: Convert to fraction form
   129,181.50/189,945 = 189,945/x
3. Step 3: Cross multiply
   129,181.50x = 189,945 × 189,945
4. Step 4: Simplify right side
   129,181.50x = 36,079,103,025
5. Step 5: Solve for x
   x = 36,079,103,025/129,181.50
6. Step 6: Final answer
   x = 279,290.01