Finding the Fourth Proportional to 21,280.48, 29,364.24 and 12,328.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,280.48 : 29,364.24 = 12,328.16 : x
2. Step 2: Convert to fraction form
   21,280.48/29,364.24 = 12,328.16/x
3. Step 3: Cross multiply
   21,280.48x = 29,364.24 × 12,328.16
4. Step 4: Simplify right side
   21,280.48x = 362,007,049.00
5. Step 5: Solve for x
   x = 362,007,049.00/21,280.48
6. Step 6: Final answer
   x = 17,011.23