Finding the Fourth Proportional to 3,477.28, 5,188.71 and 3,109

Step by Step Solution

1. Step 1: Write the proportion equation
   3,477.28 : 5,188.71 = 3,109 : x
2. Step 2: Convert to fraction form
   3,477.28/5,188.71 = 3,109/x
3. Step 3: Cross multiply
   3,477.28x = 5,188.71 × 3,109
4. Step 4: Simplify right side
   3,477.28x = 16,131,699.39
5. Step 5: Solve for x
   x = 16,131,699.39/3,477.28
6. Step 6: Final answer
   x = 4,639.17