Finding the Fourth Proportional to 21,471.50, 29,633.30 and 13,513.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,471.50 : 29,633.30 = 13,513.59 : x
2. Step 2: Convert to fraction form
   21,471.50/29,633.30 = 13,513.59/x
3. Step 3: Cross multiply
   21,471.50x = 29,633.30 × 13,513.59
4. Step 4: Simplify right side
   21,471.50x = 400,452,198.98
5. Step 5: Solve for x
   x = 400,452,198.98/21,471.50
6. Step 6: Final answer
   x = 18,650.41