Finding the Fourth Proportional to 401,465, 554,021.70 and 222,617

Step by Step Solution

1. Step 1: Write the proportion equation
   401,465 : 554,021.70 = 222,617 : x
2. Step 2: Convert to fraction form
   401,465/554,021.70 = 222,617/x
3. Step 3: Cross multiply
   401,465x = 554,021.70 × 222,617
4. Step 4: Simplify right side
   401,465x = 123,334,648,788.90
5. Step 5: Solve for x
   x = 123,334,648,788.90/401,465
6. Step 6: Final answer
   x = 307,211.46