Finding the Fourth Proportional to 19,842.72, 27,383.94 and 10,890.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,842.72 : 27,383.94 = 10,890.15 : x
2. Step 2: Convert to fraction form
   19,842.72/27,383.94 = 10,890.15/x
3. Step 3: Cross multiply
   19,842.72x = 27,383.94 × 10,890.15
4. Step 4: Simplify right side
   19,842.72x = 298,215,214.19
5. Step 5: Solve for x
   x = 298,215,214.19/19,842.72
6. Step 6: Final answer
   x = 15,028.95