Finding the Fourth Proportional to 21,017.43, 31,541.94 and 14,338.17

Step by Step Solution

1. Step 1: Write the proportion equation
   21,017.43 : 31,541.94 = 14,338.17 : x
2. Step 2: Convert to fraction form
   21,017.43/31,541.94 = 14,338.17/x
3. Step 3: Cross multiply
   21,017.43x = 31,541.94 × 14,338.17
4. Step 4: Simplify right side
   21,017.43x = 452,253,697.85
5. Step 5: Solve for x
   x = 452,253,697.85/21,017.43
6. Step 6: Final answer
   x = 21,518.03