Finding the Third Proportional to 294,494.50 and 641,134

Step by Step Solution

1. Step 1: Write the proportion equation
   294,494.50 : 641,134 = 641,134 : x
2. Step 2: Convert to fraction form
   294,494.50/641,134 = 641,134/x
3. Step 3: Cross multiply
   294,494.50x = 641,134 × 641,134
4. Step 4: Simplify right side
   294,494.50x = 411,052,805,956
5. Step 5: Solve for x
   x = 411,052,805,956/294,494.50
6. Step 6: Final answer
   x = 1,395,791.11