Finding the Fourth Proportional to 21,810.57, 30,082.31 and 14,729.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,810.57 : 30,082.31 = 14,729.61 : x
2. Step 2: Convert to fraction form
   21,810.57/30,082.31 = 14,729.61/x
3. Step 3: Cross multiply
   21,810.57x = 30,082.31 × 14,729.61
4. Step 4: Simplify right side
   21,810.57x = 443,100,620.55
5. Step 5: Solve for x
   x = 443,100,620.55/21,810.57
6. Step 6: Final answer
   x = 20,315.87