Finding the Fourth Proportional to 16,381.32, 22,636.89 and 13,396.02

Step by Step Solution

1. Step 1: Write the proportion equation
   16,381.32 : 22,636.89 = 13,396.02 : x
2. Step 2: Convert to fraction form
   16,381.32/22,636.89 = 13,396.02/x
3. Step 3: Cross multiply
   16,381.32x = 22,636.89 × 13,396.02
4. Step 4: Simplify right side
   16,381.32x = 303,244,231.18
5. Step 5: Solve for x
   x = 303,244,231.18/16,381.32
6. Step 6: Final answer
   x = 18,511.59