Finding the Fourth Proportional to 21,588.15, 29,792.15 and 12,028.67

Step by Step Solution

1. Step 1: Write the proportion equation
   21,588.15 : 29,792.15 = 12,028.67 : x
2. Step 2: Convert to fraction form
   21,588.15/29,792.15 = 12,028.67/x
3. Step 3: Cross multiply
   21,588.15x = 29,792.15 × 12,028.67
4. Step 4: Simplify right side
   21,588.15x = 358,359,940.94
5. Step 5: Solve for x
   x = 358,359,940.94/21,588.15
6. Step 6: Final answer
   x = 16,599.84