Finding the Third Proportional to 321,574 and 707,300

Step by Step Solution

1. Step 1: Write the proportion equation
   321,574 : 707,300 = 707,300 : x
2. Step 2: Convert to fraction form
   321,574/707,300 = 707,300/x
3. Step 3: Cross multiply
   321,574x = 707,300 × 707,300
4. Step 4: Simplify right side
   321,574x = 500,273,290,000
5. Step 5: Solve for x
   x = 500,273,290,000/321,574
6. Step 6: Final answer
   x = 1,555,701.92