Finding the Third Proportional to 678,699 and 1,423,494

Step by Step Solution

1. Step 1: Write the proportion equation
   678,699 : 1,423,494 = 1,423,494 : x
2. Step 2: Convert to fraction form
   678,699/1,423,494 = 1,423,494/x
3. Step 3: Cross multiply
   678,699x = 1,423,494 × 1,423,494
4. Step 4: Simplify right side
   678,699x = 2,026,335,168,036
5. Step 5: Solve for x
   x = 2,026,335,168,036/678,699
6. Step 6: Final answer
   x = 2,985,616.85