Finding the Third Proportional to 188,532 and 390,186

Step by Step Solution

1. Step 1: Write the proportion equation
   188,532 : 390,186 = 390,186 : x
2. Step 2: Convert to fraction form
   188,532/390,186 = 390,186/x
3. Step 3: Cross multiply
   188,532x = 390,186 × 390,186
4. Step 4: Simplify right side
   188,532x = 152,245,114,596
5. Step 5: Solve for x
   x = 152,245,114,596/188,532
6. Step 6: Final answer
   x = 807,529.30