Finding the Third Proportional to 388,610 and 916,048

Step by Step Solution

1. Step 1: Write the proportion equation
   388,610 : 916,048 = 916,048 : x
2. Step 2: Convert to fraction form
   388,610/916,048 = 916,048/x
3. Step 3: Cross multiply
   388,610x = 916,048 × 916,048
4. Step 4: Simplify right side
   388,610x = 839,143,938,304
5. Step 5: Solve for x
   x = 839,143,938,304/388,610
6. Step 6: Final answer
   x = 2,159,347.26