Finding the Fourth Proportional to 21,055.28, 29,055.30 and 12,096.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,055.28 : 29,055.30 = 12,096.48 : x
2. Step 2: Convert to fraction form
   21,055.28/29,055.30 = 12,096.48/x
3. Step 3: Cross multiply
   21,055.28x = 29,055.30 × 12,096.48
4. Step 4: Simplify right side
   21,055.28x = 351,466,855.34
5. Step 5: Solve for x
   x = 351,466,855.34/21,055.28
6. Step 6: Final answer
   x = 16,692.58