Finding the Fourth Proportional to 401,687, 554,328.08 and 222,839

Step by Step Solution

1. Step 1: Write the proportion equation
   401,687 : 554,328.08 = 222,839 : x
2. Step 2: Convert to fraction form
   401,687/554,328.08 = 222,839/x
3. Step 3: Cross multiply
   401,687x = 554,328.08 × 222,839
4. Step 4: Simplify right side
   401,687x = 123,525,915,019.12
5. Step 5: Solve for x
   x = 123,525,915,019.12/401,687
6. Step 6: Final answer
   x = 307,517.83