Finding the Fourth Proportional to 5,109.02, 7,661.91 and 2,186.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.02 : 7,661.91 = 2,186.54 : x
2. Step 2: Convert to fraction form
   5,109.02/7,661.91 = 2,186.54/x
3. Step 3: Cross multiply
   5,109.02x = 7,661.91 × 2,186.54
4. Step 4: Simplify right side
   5,109.02x = 16,753,072.69
5. Step 5: Solve for x
   x = 16,753,072.69/5,109.02
6. Step 6: Final answer
   x = 3,279.12