Finding the Fourth Proportional to 11,315.71, 15,622.72 and 10,609.64

Step by Step Solution

1. Step 1: Write the proportion equation
   11,315.71 : 15,622.72 = 10,609.64 : x
2. Step 2: Convert to fraction form
   11,315.71/15,622.72 = 10,609.64/x
3. Step 3: Cross multiply
   11,315.71x = 15,622.72 × 10,609.64
4. Step 4: Simplify right side
   11,315.71x = 165,751,448.10
5. Step 5: Solve for x
   x = 165,751,448.10/11,315.71
6. Step 6: Final answer
   x = 14,647.91