Finding the Fourth Proportional to 19,921.56, 27,491.86 and 11,424.00

Step by Step Solution

1. Step 1: Write the proportion equation
   19,921.56 : 27,491.86 = 11,424.00 : x
2. Step 2: Convert to fraction form
   19,921.56/27,491.86 = 11,424.00/x
3. Step 3: Cross multiply
   19,921.56x = 27,491.86 × 11,424.00
4. Step 4: Simplify right side
   19,921.56x = 314,067,061.75
5. Step 5: Solve for x
   x = 314,067,061.75/19,921.56
6. Step 6: Final answer
   x = 15,765.18