Finding the Third Proportional to 117,288 and 255,747.38

Step by Step Solution

1. Step 1: Write the proportion equation
   117,288 : 255,747.38 = 255,747.38 : x
2. Step 2: Convert to fraction form
   117,288/255,747.38 = 255,747.38/x
3. Step 3: Cross multiply
   117,288x = 255,747.38 × 255,747.38
4. Step 4: Simplify right side
   117,288x = 65,406,719,819.39
5. Step 5: Solve for x
   x = 65,406,719,819.39/117,288
6. Step 6: Final answer
   x = 557,659.09