Finding the Fourth Proportional to 12,285.72, 18,410.04 and 5,704.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,285.72 : 18,410.04 = 5,704.20 : x
2. Step 2: Convert to fraction form
   12,285.72/18,410.04 = 5,704.20/x
3. Step 3: Cross multiply
   12,285.72x = 18,410.04 × 5,704.20
4. Step 4: Simplify right side
   12,285.72x = 105,014,550.17
5. Step 5: Solve for x
   x = 105,014,550.17/12,285.72
6. Step 6: Final answer
   x = 8,547.69