Finding the Third Proportional to 721,131 and 1,538,799

Step by Step Solution

1. Step 1: Write the proportion equation
   721,131 : 1,538,799 = 1,538,799 : x
2. Step 2: Convert to fraction form
   721,131/1,538,799 = 1,538,799/x
3. Step 3: Cross multiply
   721,131x = 1,538,799 × 1,538,799
4. Step 4: Simplify right side
   721,131x = 2,367,902,362,401
5. Step 5: Solve for x
   x = 2,367,902,362,401/721,131
6. Step 6: Final answer
   x = 3,283,595.30