Finding the Third Proportional to 86,900 and 190,404

Step by Step Solution

1. Step 1: Write the proportion equation
   86,900 : 190,404 = 190,404 : x
2. Step 2: Convert to fraction form
   86,900/190,404 = 190,404/x
3. Step 3: Cross multiply
   86,900x = 190,404 × 190,404
4. Step 4: Simplify right side
   86,900x = 36,253,683,216
5. Step 5: Solve for x
   x = 36,253,683,216/86,900
6. Step 6: Final answer
   x = 417,188.53