Finding the Third Proportional to 82,984.50 and 128,709

Step by Step Solution

1. Step 1: Write the proportion equation
   82,984.50 : 128,709 = 128,709 : x
2. Step 2: Convert to fraction form
   82,984.50/128,709 = 128,709/x
3. Step 3: Cross multiply
   82,984.50x = 128,709 × 128,709
4. Step 4: Simplify right side
   82,984.50x = 16,566,006,681
5. Step 5: Solve for x
   x = 16,566,006,681/82,984.50
6. Step 6: Final answer
   x = 199,627.72