Finding the Third Proportional to 1,137,428 and 2,489,128

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137,428 : 2,489,128 = 2,489,128 : x
2. Step 2: Convert to fraction form
   1,137,428/2,489,128 = 2,489,128/x
3. Step 3: Cross multiply
   1,137,428x = 2,489,128 × 2,489,128
4. Step 4: Simplify right side
   1,137,428x = 6,195,758,200,384
5. Step 5: Solve for x
   x = 6,195,758,200,384/1,137,428
6. Step 6: Final answer
   x = 5,447,165.18