Finding the Third Proportional to 727,128 and 1,489,518

Step by Step Solution

1. Step 1: Write the proportion equation
   727,128 : 1,489,518 = 1,489,518 : x
2. Step 2: Convert to fraction form
   727,128/1,489,518 = 1,489,518/x
3. Step 3: Cross multiply
   727,128x = 1,489,518 × 1,489,518
4. Step 4: Simplify right side
   727,128x = 2,218,663,872,324
5. Step 5: Solve for x
   x = 2,218,663,872,324/727,128
6. Step 6: Final answer
   x = 3,051,270.03