Finding the Third Proportional to 758,406 and 1,638,443

Step by Step Solution

1. Step 1: Write the proportion equation
   758,406 : 1,638,443 = 1,638,443 : x
2. Step 2: Convert to fraction form
   758,406/1,638,443 = 1,638,443/x
3. Step 3: Cross multiply
   758,406x = 1,638,443 × 1,638,443
4. Step 4: Simplify right side
   758,406x = 2,684,495,464,249
5. Step 5: Solve for x
   x = 2,684,495,464,249/758,406
6. Step 6: Final answer
   x = 3,539,654.83