Finding the Fourth Proportional to 22,619.36, 31,208.29 and 13,186.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,619.36 : 31,208.29 = 13,186.10 : x
2. Step 2: Convert to fraction form
   22,619.36/31,208.29 = 13,186.10/x
3. Step 3: Cross multiply
   22,619.36x = 31,208.29 × 13,186.10
4. Step 4: Simplify right side
   22,619.36x = 411,515,443.76
5. Step 5: Solve for x
   x = 411,515,443.76/22,619.36
6. Step 6: Final answer
   x = 18,193.07