Finding the Third Proportional to 89,420 and 186,186

Step by Step Solution

1. Step 1: Write the proportion equation
   89,420 : 186,186 = 186,186 : x
2. Step 2: Convert to fraction form
   89,420/186,186 = 186,186/x
3. Step 3: Cross multiply
   89,420x = 186,186 × 186,186
4. Step 4: Simplify right side
   89,420x = 34,665,226,596
5. Step 5: Solve for x
   x = 34,665,226,596/89,420
6. Step 6: Final answer
   x = 387,667.49