Finding the Fourth Proportional to 19,868.72, 27,419.46 and 10,916.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,868.72 : 27,419.46 = 10,916.42 : x
2. Step 2: Convert to fraction form
   19,868.72/27,419.46 = 10,916.42/x
3. Step 3: Cross multiply
   19,868.72x = 27,419.46 × 10,916.42
4. Step 4: Simplify right side
   19,868.72x = 299,322,204.44
5. Step 5: Solve for x
   x = 299,322,204.44/19,868.72
6. Step 6: Final answer
   x = 15,065.00