Finding the Fourth Proportional to 401,685, 554,325.30 and 222,837

Step by Step Solution

1. Step 1: Write the proportion equation
   401,685 : 554,325.30 = 222,837 : x
2. Step 2: Convert to fraction form
   401,685/554,325.30 = 222,837/x
3. Step 3: Cross multiply
   401,685x = 554,325.30 × 222,837
4. Step 4: Simplify right side
   401,685x = 123,524,186,876.10
5. Step 5: Solve for x
   x = 123,524,186,876.10/401,685
6. Step 6: Final answer
   x = 307,515.06