Finding the Third Proportional to 129,069.50 and 189,371

Step by Step Solution

1. Step 1: Write the proportion equation
   129,069.50 : 189,371 = 189,371 : x
2. Step 2: Convert to fraction form
   129,069.50/189,371 = 189,371/x
3. Step 3: Cross multiply
   129,069.50x = 189,371 × 189,371
4. Step 4: Simplify right side
   129,069.50x = 35,861,375,641
5. Step 5: Solve for x
   x = 35,861,375,641/129,069.50
6. Step 6: Final answer
   x = 277,845.47