Finding the Fourth Proportional to 17,183.30, 25,724.55 and 12,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,183.30 : 25,724.55 = 12,820.10 : x
2. Step 2: Convert to fraction form
   17,183.30/25,724.55 = 12,820.10/x
3. Step 3: Cross multiply
   17,183.30x = 25,724.55 × 12,820.10
4. Step 4: Simplify right side
   17,183.30x = 329,791,303.46
5. Step 5: Solve for x
   x = 329,791,303.46/17,183.30
6. Step 6: Final answer
   x = 19,192.55