Finding the Fourth Proportional to 12,561.56, 18,842.42 and 3,201.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,561.56 : 18,842.42 = 3,201.60 : x
2. Step 2: Convert to fraction form
   12,561.56/18,842.42 = 3,201.60/x
3. Step 3: Cross multiply
   12,561.56x = 18,842.42 × 3,201.60
4. Step 4: Simplify right side
   12,561.56x = 60,325,891.87
5. Step 5: Solve for x
   x = 60,325,891.87/12,561.56
6. Step 6: Final answer
   x = 4,802.42