Finding the Fourth Proportional to 11,150.10, 16,715.16 and 4,128.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,150.10 : 16,715.16 = 4,128.62 : x
2. Step 2: Convert to fraction form
   11,150.10/16,715.16 = 4,128.62/x
3. Step 3: Cross multiply
   11,150.10x = 16,715.16 × 4,128.62
4. Step 4: Simplify right side
   11,150.10x = 69,010,460.30
5. Step 5: Solve for x
   x = 69,010,460.30/11,150.10
6. Step 6: Final answer
   x = 6,189.22