Finding the Third Proportional to 369,360 and 501,390

Step by Step Solution

1. Step 1: Write the proportion equation
   369,360 : 501,390 = 501,390 : x
2. Step 2: Convert to fraction form
   369,360/501,390 = 501,390/x
3. Step 3: Cross multiply
   369,360x = 501,390 × 501,390
4. Step 4: Simplify right side
   369,360x = 251,391,932,100
5. Step 5: Solve for x
   x = 251,391,932,100/369,360
6. Step 6: Final answer
   x = 680,614.93