Finding the Fourth Proportional to 11,510.37, 15,815.47 and 9,148.41

Step by Step Solution

1. Step 1: Write the proportion equation
   11,510.37 : 15,815.47 = 9,148.41 : x
2. Step 2: Convert to fraction form
   11,510.37/15,815.47 = 9,148.41/x
3. Step 3: Cross multiply
   11,510.37x = 15,815.47 × 9,148.41
4. Step 4: Simplify right side
   11,510.37x = 144,686,403.90
5. Step 5: Solve for x
   x = 144,686,403.90/11,510.37
6. Step 6: Final answer
   x = 12,570.09