Finding the Fourth Proportional to 10,974.88, 15,147.57 and 7,439.23

Step by Step Solution

1. Step 1: Write the proportion equation
   10,974.88 : 15,147.57 = 7,439.23 : x
2. Step 2: Convert to fraction form
   10,974.88/15,147.57 = 7,439.23/x
3. Step 3: Cross multiply
   10,974.88x = 15,147.57 × 7,439.23
4. Step 4: Simplify right side
   10,974.88x = 112,686,257.17
5. Step 5: Solve for x
   x = 112,686,257.17/10,974.88
6. Step 6: Final answer
   x = 10,267.65