Finding the Fourth Proportional to 21,059.55, 29,035.89 and 13,493.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,059.55 : 29,035.89 = 13,493.43 : x
2. Step 2: Convert to fraction form
   21,059.55/29,035.89 = 13,493.43/x
3. Step 3: Cross multiply
   21,059.55x = 29,035.89 × 13,493.43
4. Step 4: Simplify right side
   21,059.55x = 391,793,749.20
5. Step 5: Solve for x
   x = 391,793,749.20/21,059.55
6. Step 6: Final answer
   x = 18,604.09