Finding the Third Proportional to 2,159,128 and 4,650,405

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159,128 : 4,650,405 = 4,650,405 : x
2. Step 2: Convert to fraction form
   2,159,128/4,650,405 = 4,650,405/x
3. Step 3: Cross multiply
   2,159,128x = 4,650,405 × 4,650,405
4. Step 4: Simplify right side
   2,159,128x = 21,626,266,664,025
5. Step 5: Solve for x
   x = 21,626,266,664,025/2,159,128
6. Step 6: Final answer
   x = 10,016,204.07