Finding the Third Proportional to 128,520 and 200,092

Step by Step Solution

1. Step 1: Write the proportion equation
   128,520 : 200,092 = 200,092 : x
2. Step 2: Convert to fraction form
   128,520/200,092 = 200,092/x
3. Step 3: Cross multiply
   128,520x = 200,092 × 200,092
4. Step 4: Simplify right side
   128,520x = 40,036,808,464
5. Step 5: Solve for x
   x = 40,036,808,464/128,520
6. Step 6: Final answer
   x = 311,522.01