Finding the Fourth Proportional to 19,123.89, 26,389.56 and 11,574.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,123.89 : 26,389.56 = 11,574.42 : x
2. Step 2: Convert to fraction form
   19,123.89/26,389.56 = 11,574.42/x
3. Step 3: Cross multiply
   19,123.89x = 26,389.56 × 11,574.42
4. Step 4: Simplify right side
   19,123.89x = 305,443,851.06
5. Step 5: Solve for x
   x = 305,443,851.06/19,123.89
6. Step 6: Final answer
   x = 15,971.85