Finding the Third Proportional to 129,991.50 and 270,189

Step by Step Solution

1. Step 1: Write the proportion equation
   129,991.50 : 270,189 = 270,189 : x
2. Step 2: Convert to fraction form
   129,991.50/270,189 = 270,189/x
3. Step 3: Cross multiply
   129,991.50x = 270,189 × 270,189
4. Step 4: Simplify right side
   129,991.50x = 73,002,095,721
5. Step 5: Solve for x
   x = 73,002,095,721/129,991.50
6. Step 6: Final answer
   x = 561,591.30