Finding the Fourth Proportional to 18,942.72, 26,142.72 and 10,559.04

Step by Step Solution

1. Step 1: Write the proportion equation
   18,942.72 : 26,142.72 = 10,559.04 : x
2. Step 2: Convert to fraction form
   18,942.72/26,142.72 = 10,559.04/x
3. Step 3: Cross multiply
   18,942.72x = 26,142.72 × 10,559.04
4. Step 4: Simplify right side
   18,942.72x = 276,042,026.19
5. Step 5: Solve for x
   x = 276,042,026.19/18,942.72
6. Step 6: Final answer
   x = 14,572.46