Finding the Fourth Proportional to 21,528.72, 29,710.16 and 12,097.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,528.72 : 29,710.16 = 12,097.04 : x
2. Step 2: Convert to fraction form
   21,528.72/29,710.16 = 12,097.04/x
3. Step 3: Cross multiply
   21,528.72x = 29,710.16 × 12,097.04
4. Step 4: Simplify right side
   21,528.72x = 359,404,993.93
5. Step 5: Solve for x
   x = 359,404,993.93/21,528.72
6. Step 6: Final answer
   x = 16,694.21