Finding the Third Proportional to 188,514 and 390,150

Step by Step Solution

1. Step 1: Write the proportion equation
   188,514 : 390,150 = 390,150 : x
2. Step 2: Convert to fraction form
   188,514/390,150 = 390,150/x
3. Step 3: Cross multiply
   188,514x = 390,150 × 390,150
4. Step 4: Simplify right side
   188,514x = 152,217,022,500
5. Step 5: Solve for x
   x = 152,217,022,500/188,514
6. Step 6: Final answer
   x = 807,457.39