Finding the Third Proportional to 82,173 and 130,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   82,173 : 130,639.50 = 130,639.50 : x
2. Step 2: Convert to fraction form
   82,173/130,639.50 = 130,639.50/x
3. Step 3: Cross multiply
   82,173x = 130,639.50 × 130,639.50
4. Step 4: Simplify right side
   82,173x = 17,066,678,960.25
5. Step 5: Solve for x
   x = 17,066,678,960.25/82,173
6. Step 6: Final answer
   x = 207,692.05