Finding the Third Proportional to 334,198.50 and 721,665

Step by Step Solution

1. Step 1: Write the proportion equation
   334,198.50 : 721,665 = 721,665 : x
2. Step 2: Convert to fraction form
   334,198.50/721,665 = 721,665/x
3. Step 3: Cross multiply
   334,198.50x = 721,665 × 721,665
4. Step 4: Simplify right side
   334,198.50x = 520,800,372,225
5. Step 5: Solve for x
   x = 520,800,372,225/334,198.50
6. Step 6: Final answer
   x = 1,558,356.40