Finding the Fourth Proportional to 21,619.52, 29,835.24 and 12,059.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,619.52 : 29,835.24 = 12,059.12 : x
2. Step 2: Convert to fraction form
   21,619.52/29,835.24 = 12,059.12/x
3. Step 3: Cross multiply
   21,619.52x = 29,835.24 × 12,059.12
4. Step 4: Simplify right side
   21,619.52x = 359,786,739.39
5. Step 5: Solve for x
   x = 359,786,739.39/21,619.52
6. Step 6: Final answer
   x = 16,641.75