Finding the Third Proportional to 758,468 and 1,638,405

Step by Step Solution

1. Step 1: Write the proportion equation
   758,468 : 1,638,405 = 1,638,405 : x
2. Step 2: Convert to fraction form
   758,468/1,638,405 = 1,638,405/x
3. Step 3: Cross multiply
   758,468x = 1,638,405 × 1,638,405
4. Step 4: Simplify right side
   758,468x = 2,684,370,944,025
5. Step 5: Solve for x
   x = 2,684,370,944,025/758,468
6. Step 6: Final answer
   x = 3,539,201.32