Finding the Fourth Proportional to 19,921.16, 27,491.30 and 10,969.56

Step by Step Solution

1. Step 1: Write the proportion equation
   19,921.16 : 27,491.30 = 10,969.56 : x
2. Step 2: Convert to fraction form
   19,921.16/27,491.30 = 10,969.56/x
3. Step 3: Cross multiply
   19,921.16x = 27,491.30 × 10,969.56
4. Step 4: Simplify right side
   19,921.16x = 301,567,464.83
5. Step 5: Solve for x
   x = 301,567,464.83/19,921.16
6. Step 6: Final answer
   x = 15,138.05