Finding the Fourth Proportional to 19,873.56, 27,426.15 and 10,921.89

Step by Step Solution

1. Step 1: Write the proportion equation
   19,873.56 : 27,426.15 = 10,921.89 : x
2. Step 2: Convert to fraction form
   19,873.56/27,426.15 = 10,921.89/x
3. Step 3: Cross multiply
   19,873.56x = 27,426.15 × 10,921.89
4. Step 4: Simplify right side
   19,873.56x = 299,545,393.42
5. Step 5: Solve for x
   x = 299,545,393.42/19,873.56
6. Step 6: Final answer
   x = 15,072.56