Finding the Fourth Proportional to 4,668.81, 7,007.61 and 3,109.91

Step by Step Solution

1. Step 1: Write the proportion equation
   4,668.81 : 7,007.61 = 3,109.91 : x
2. Step 2: Convert to fraction form
   4,668.81/7,007.61 = 3,109.91/x
3. Step 3: Cross multiply
   4,668.81x = 7,007.61 × 3,109.91
4. Step 4: Simplify right side
   4,668.81x = 21,792,985.83
5. Step 5: Solve for x
   x = 21,792,985.83/4,668.81
6. Step 6: Final answer
   x = 4,667.79