Finding the Third Proportional to 339,874.50 and 740,415

Step by Step Solution

1. Step 1: Write the proportion equation
   339,874.50 : 740,415 = 740,415 : x
2. Step 2: Convert to fraction form
   339,874.50/740,415 = 740,415/x
3. Step 3: Cross multiply
   339,874.50x = 740,415 × 740,415
4. Step 4: Simplify right side
   339,874.50x = 548,214,372,225
5. Step 5: Solve for x
   x = 548,214,372,225/339,874.50
6. Step 6: Final answer
   x = 1,612,990.60