Finding the Fourth Proportional to 10,914.94, 15,065.83 and 9,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,914.94 : 15,065.83 = 9,438.72 : x
2. Step 2: Convert to fraction form
   10,914.94/15,065.83 = 9,438.72/x
3. Step 3: Cross multiply
   10,914.94x = 15,065.83 × 9,438.72
4. Step 4: Simplify right side
   10,914.94x = 142,202,150.94
5. Step 5: Solve for x
   x = 142,202,150.94/10,914.94
6. Step 6: Final answer
   x = 13,028.21