Finding the Third Proportional to 1,129,140 and 2,485,728

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129,140 : 2,485,728 = 2,485,728 : x
2. Step 2: Convert to fraction form
   1,129,140/2,485,728 = 2,485,728/x
3. Step 3: Cross multiply
   1,129,140x = 2,485,728 × 2,485,728
4. Step 4: Simplify right side
   1,129,140x = 6,178,843,689,984
5. Step 5: Solve for x
   x = 6,178,843,689,984/1,129,140
6. Step 6: Final answer
   x = 5,472,167.92