Finding the Fourth Proportional to 21,490.56, 29,658.48 and 12,059.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,490.56 : 29,658.48 = 12,059.52 : x
2. Step 2: Convert to fraction form
   21,490.56/29,658.48 = 12,059.52/x
3. Step 3: Cross multiply
   21,490.56x = 29,658.48 × 12,059.52
4. Step 4: Simplify right side
   21,490.56x = 357,667,032.73
5. Step 5: Solve for x
   x = 357,667,032.73/21,490.56
6. Step 6: Final answer
   x = 16,642.98