Finding the Third Proportional to 86,436 and 188,916

Step by Step Solution

1. Step 1: Write the proportion equation
   86,436 : 188,916 = 188,916 : x
2. Step 2: Convert to fraction form
   86,436/188,916 = 188,916/x
3. Step 3: Cross multiply
   86,436x = 188,916 × 188,916
4. Step 4: Simplify right side
   86,436x = 35,689,255,056
5. Step 5: Solve for x
   x = 35,689,255,056/86,436
6. Step 6: Final answer
   x = 412,898.04