Finding the Third Proportional to 128,436 and 204,549.75

Step by Step Solution

1. Step 1: Write the proportion equation
   128,436 : 204,549.75 = 204,549.75 : x
2. Step 2: Convert to fraction form
   128,436/204,549.75 = 204,549.75/x
3. Step 3: Cross multiply
   128,436x = 204,549.75 × 204,549.75
4. Step 4: Simplify right side
   128,436x = 41,840,600,225.06
5. Step 5: Solve for x
   x = 41,840,600,225.06/128,436
6. Step 6: Final answer
   x = 325,770.04