Finding the Fourth Proportional to 19,141.72, 28,663.37 and 11,723.69

Step by Step Solution

1. Step 1: Write the proportion equation
   19,141.72 : 28,663.37 = 11,723.69 : x
2. Step 2: Convert to fraction form
   19,141.72/28,663.37 = 11,723.69/x
3. Step 3: Cross multiply
   19,141.72x = 28,663.37 × 11,723.69
4. Step 4: Simplify right side
   19,141.72x = 336,040,360.01
5. Step 5: Solve for x
   x = 336,040,360.01/19,141.72
6. Step 6: Final answer
   x = 17,555.39