Finding the Fourth Proportional to 16,742.69, 23,105.55 and 9,189.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,742.69 : 23,105.55 = 9,189.30 : x
2. Step 2: Convert to fraction form
   16,742.69/23,105.55 = 9,189.30/x
3. Step 3: Cross multiply
   16,742.69x = 23,105.55 × 9,189.30
4. Step 4: Simplify right side
   16,742.69x = 212,323,830.62
5. Step 5: Solve for x
   x = 212,323,830.62/16,742.69
6. Step 6: Final answer
   x = 12,681.58