Finding the Fourth Proportional to 12,561.12, 18,845.25 and 10,243.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,561.12 : 18,845.25 = 10,243.05 : x
2. Step 2: Convert to fraction form
   12,561.12/18,845.25 = 10,243.05/x
3. Step 3: Cross multiply
   12,561.12x = 18,845.25 × 10,243.05
4. Step 4: Simplify right side
   12,561.12x = 193,032,838.01
5. Step 5: Solve for x
   x = 193,032,838.01/12,561.12
6. Step 6: Final answer
   x = 15,367.49