Finding the Fourth Proportional to 16,458.82, 24,686.80 and 13,321.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16,458.82 : 24,686.80 = 13,321.69 : x
2. Step 2: Convert to fraction form
   16,458.82/24,686.80 = 13,321.69/x
3. Step 3: Cross multiply
   16,458.82x = 24,686.80 × 13,321.69
4. Step 4: Simplify right side
   16,458.82x = 328,869,896.69
5. Step 5: Solve for x
   x = 328,869,896.69/16,458.82
6. Step 6: Final answer
   x = 19,981.38