Finding the Fourth Proportional to 12,395.09, 17,111.90 and 9,556.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,395.09 : 17,111.90 = 9,556.25 : x
2. Step 2: Convert to fraction form
   12,395.09/17,111.90 = 9,556.25/x
3. Step 3: Cross multiply
   12,395.09x = 17,111.90 × 9,556.25
4. Step 4: Simplify right side
   12,395.09x = 163,525,532.71
5. Step 5: Solve for x
   x = 163,525,532.71/12,395.09
6. Step 6: Final answer
   x = 13,192.76