Finding the Fourth Proportional to 11,109.78, 16,654.86 and 4,189.14

Step by Step Solution

1. Step 1: Write the proportion equation
   11,109.78 : 16,654.86 = 4,189.14 : x
2. Step 2: Convert to fraction form
   11,109.78/16,654.86 = 4,189.14/x
3. Step 3: Cross multiply
   11,109.78x = 16,654.86 × 4,189.14
4. Step 4: Simplify right side
   11,109.78x = 69,769,540.22
5. Step 5: Solve for x
   x = 69,769,540.22/11,109.78
6. Step 6: Final answer
   x = 6,280.01