Finding the Fourth Proportional to 11,091.88, 15,314.48 and 10,386.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,091.88 : 15,314.48 = 10,386.10 : x
2. Step 2: Convert to fraction form
   11,091.88/15,314.48 = 10,386.10/x
3. Step 3: Cross multiply
   11,091.88x = 15,314.48 × 10,386.10
4. Step 4: Simplify right side
   11,091.88x = 159,057,720.73
5. Step 5: Solve for x
   x = 159,057,720.73/11,091.88
6. Step 6: Final answer
   x = 14,340.01