Finding the Fourth Proportional to 22,111.21, 30,506.05 and 13,153.62

Step by Step Solution

1. Step 1: Write the proportion equation
   22,111.21 : 30,506.05 = 13,153.62 : x
2. Step 2: Convert to fraction form
   22,111.21/30,506.05 = 13,153.62/x
3. Step 3: Cross multiply
   22,111.21x = 30,506.05 × 13,153.62
4. Step 4: Simplify right side
   22,111.21x = 401,264,989.40
5. Step 5: Solve for x
   x = 401,264,989.40/22,111.21
6. Step 6: Final answer
   x = 18,147.58