Finding the Fourth Proportional to 7,109.96, 9,811.83 and 3,966.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,109.96 : 9,811.83 = 3,966.15 : x
2. Step 2: Convert to fraction form
   7,109.96/9,811.83 = 3,966.15/x
3. Step 3: Cross multiply
   7,109.96x = 9,811.83 × 3,966.15
4. Step 4: Simplify right side
   7,109.96x = 38,915,140.50
5. Step 5: Solve for x
   x = 38,915,140.50/7,109.96
6. Step 6: Final answer
   x = 5,473.33