Finding the Fourth Proportional to 13,904.01, 19,172.16 and 8,860.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,904.01 : 19,172.16 = 8,860.25 : x
2. Step 2: Convert to fraction form
   13,904.01/19,172.16 = 8,860.25/x
3. Step 3: Cross multiply
   13,904.01x = 19,172.16 × 8,860.25
4. Step 4: Simplify right side
   13,904.01x = 169,870,034.78
5. Step 5: Solve for x
   x = 169,870,034.78/13,904.01
6. Step 6: Final answer
   x = 12,217.34