Finding the Fourth Proportional to 21,059.41, 29,035.73 and 13,493.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,059.41 : 29,035.73 = 13,493.31 : x
2. Step 2: Convert to fraction form
   21,059.41/29,035.73 = 13,493.31/x
3. Step 3: Cross multiply
   21,059.41x = 29,035.73 × 13,493.31
4. Step 4: Simplify right side
   21,059.41x = 391,788,105.97
5. Step 5: Solve for x
   x = 391,788,105.97/21,059.41
6. Step 6: Final answer
   x = 18,603.95