Finding the Third Proportional to 251,279 and 388,584

Step by Step Solution

1. Step 1: Write the proportion equation
   251,279 : 388,584 = 388,584 : x
2. Step 2: Convert to fraction form
   251,279/388,584 = 388,584/x
3. Step 3: Cross multiply
   251,279x = 388,584 × 388,584
4. Step 4: Simplify right side
   251,279x = 150,997,525,056
5. Step 5: Solve for x
   x = 150,997,525,056/251,279
6. Step 6: Final answer
   x = 600,915.81