Finding the Third Proportional to 721,398 and 1,539,300

Step by Step Solution

1. Step 1: Write the proportion equation
   721,398 : 1,539,300 = 1,539,300 : x
2. Step 2: Convert to fraction form
   721,398/1,539,300 = 1,539,300/x
3. Step 3: Cross multiply
   721,398x = 1,539,300 × 1,539,300
4. Step 4: Simplify right side
   721,398x = 2,369,444,490,000
5. Step 5: Solve for x
   x = 2,369,444,490,000/721,398
6. Step 6: Final answer
   x = 3,284,517.69