Finding the Third Proportional to 128,282 and 201,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,282 : 201,231.50 = 201,231.50 : x
2. Step 2: Convert to fraction form
   128,282/201,231.50 = 201,231.50/x
3. Step 3: Cross multiply
   128,282x = 201,231.50 × 201,231.50
4. Step 4: Simplify right side
   128,282x = 40,494,116,592.25
5. Step 5: Solve for x
   x = 40,494,116,592.25/128,282
6. Step 6: Final answer
   x = 315,664.84