Finding the Third Proportional to 390,116.25 and 843,048

Step by Step Solution

1. Step 1: Write the proportion equation
   390,116.25 : 843,048 = 843,048 : x
2. Step 2: Convert to fraction form
   390,116.25/843,048 = 843,048/x
3. Step 3: Cross multiply
   390,116.25x = 843,048 × 843,048
4. Step 4: Simplify right side
   390,116.25x = 710,729,930,304
5. Step 5: Solve for x
   x = 710,729,930,304/390,116.25
6. Step 6: Final answer
   x = 1,821,841.39