Finding the Fourth Proportional to 21,586.96, 29,792.73 and 12,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,586.96 : 29,792.73 = 12,155.50 : x
2. Step 2: Convert to fraction form
   21,586.96/29,792.73 = 12,155.50/x
3. Step 3: Cross multiply
   21,586.96x = 29,792.73 × 12,155.50
4. Step 4: Simplify right side
   21,586.96x = 362,145,529.52
5. Step 5: Solve for x
   x = 362,145,529.52/21,586.96
6. Step 6: Final answer
   x = 16,776.12