Finding the Third Proportional to 88,717.78 and 189,881.72

Step by Step Solution

1. Step 1: Write the proportion equation
   88,717.78 : 189,881.72 = 189,881.72 : x
2. Step 2: Convert to fraction form
   88,717.78/189,881.72 = 189,881.72/x
3. Step 3: Cross multiply
   88,717.78x = 189,881.72 × 189,881.72
4. Step 4: Simplify right side
   88,717.78x = 36,055,067,115.45
5. Step 5: Solve for x
   x = 36,055,067,115.45/88,717.78
6. Step 6: Final answer
   x = 406,401.81