Finding the Third Proportional to 333,799 and 721,300

Step by Step Solution

1. Step 1: Write the proportion equation
   333,799 : 721,300 = 721,300 : x
2. Step 2: Convert to fraction form
   333,799/721,300 = 721,300/x
3. Step 3: Cross multiply
   333,799x = 721,300 × 721,300
4. Step 4: Simplify right side
   333,799x = 520,273,690,000
5. Step 5: Solve for x
   x = 520,273,690,000/333,799
6. Step 6: Final answer
   x = 1,558,643.64