Finding the Third Proportional to 367,405 and 520,021.50

Step by Step Solution

1. Step 1: Write the proportion equation
   367,405 : 520,021.50 = 520,021.50 : x
2. Step 2: Convert to fraction form
   367,405/520,021.50 = 520,021.50/x
3. Step 3: Cross multiply
   367,405x = 520,021.50 × 520,021.50
4. Step 4: Simplify right side
   367,405x = 270,422,360,462.25
5. Step 5: Solve for x
   x = 270,422,360,462.25/367,405
6. Step 6: Final answer
   x = 736,033.42