Finding the Fourth Proportional to 21,821.83, 30,116.94 and 13,322.17

Step by Step Solution

1. Step 1: Write the proportion equation
   21,821.83 : 30,116.94 = 13,322.17 : x
2. Step 2: Convert to fraction form
   21,821.83/30,116.94 = 13,322.17/x
3. Step 3: Cross multiply
   21,821.83x = 30,116.94 × 13,322.17
4. Step 4: Simplify right side
   21,821.83x = 401,222,927.95
5. Step 5: Solve for x
   x = 401,222,927.95/21,821.83
6. Step 6: Final answer
   x = 18,386.31