Finding the Fourth Proportional to 22,619, 31,214.22 and 13,185.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,619 : 31,214.22 = 13,185.74 : x
2. Step 2: Convert to fraction form
   22,619/31,214.22 = 13,185.74/x
3. Step 3: Cross multiply
   22,619x = 31,214.22 × 13,185.74
4. Step 4: Simplify right side
   22,619x = 411,582,589.22
5. Step 5: Solve for x
   x = 411,582,589.22/22,619
6. Step 6: Final answer
   x = 18,196.32