Finding the Third Proportional to 327,478.50 and 520,740

Step by Step Solution

1. Step 1: Write the proportion equation
   327,478.50 : 520,740 = 520,740 : x
2. Step 2: Convert to fraction form
   327,478.50/520,740 = 520,740/x
3. Step 3: Cross multiply
   327,478.50x = 520,740 × 520,740
4. Step 4: Simplify right side
   327,478.50x = 271,170,147,600
5. Step 5: Solve for x
   x = 271,170,147,600/327,478.50
6. Step 6: Final answer
   x = 828,054.81