Finding the Fourth Proportional to 21,586.10, 29,788.71 and 12,154.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,586.10 : 29,788.71 = 12,154.73 : x
2. Step 2: Convert to fraction form
   21,586.10/29,788.71 = 12,154.73/x
3. Step 3: Cross multiply
   21,586.10x = 29,788.71 × 12,154.73
4. Step 4: Simplify right side
   21,586.10x = 362,073,727.10
5. Step 5: Solve for x
   x = 362,073,727.10/21,586.10
6. Step 6: Final answer
   x = 16,773.47