Finding the Third Proportional to 265,748 and 388,390

Step by Step Solution

1. Step 1: Write the proportion equation
   265,748 : 388,390 = 388,390 : x
2. Step 2: Convert to fraction form
   265,748/388,390 = 388,390/x
3. Step 3: Cross multiply
   265,748x = 388,390 × 388,390
4. Step 4: Simplify right side
   265,748x = 150,846,792,100
5. Step 5: Solve for x
   x = 150,846,792,100/265,748
6. Step 6: Final answer
   x = 567,630.96