Finding the Third Proportional to 188,530 and 390,182

Step by Step Solution

1. Step 1: Write the proportion equation
   188,530 : 390,182 = 390,182 : x
2. Step 2: Convert to fraction form
   188,530/390,182 = 390,182/x
3. Step 3: Cross multiply
   188,530x = 390,182 × 390,182
4. Step 4: Simplify right side
   188,530x = 152,241,993,124
5. Step 5: Solve for x
   x = 152,241,993,124/188,530
6. Step 6: Final answer
   x = 807,521.31