Finding the Third Proportional to 129,085.50 and 189,396

Step by Step Solution

1. Step 1: Write the proportion equation
   129,085.50 : 189,396 = 189,396 : x
2. Step 2: Convert to fraction form
   129,085.50/189,396 = 189,396/x
3. Step 3: Cross multiply
   129,085.50x = 189,396 × 189,396
4. Step 4: Simplify right side
   129,085.50x = 35,870,844,816
5. Step 5: Solve for x
   x = 35,870,844,816/129,085.50
6. Step 6: Final answer
   x = 277,884.39