Finding the Third Proportional to 646,557 and 1,405,028

Step by Step Solution

1. Step 1: Write the proportion equation
   646,557 : 1,405,028 = 1,405,028 : x
2. Step 2: Convert to fraction form
   646,557/1,405,028 = 1,405,028/x
3. Step 3: Cross multiply
   646,557x = 1,405,028 × 1,405,028
4. Step 4: Simplify right side
   646,557x = 1,974,103,680,784
5. Step 5: Solve for x
   x = 1,974,103,680,784/646,557
6. Step 6: Final answer
   x = 3,053,255.45