Finding the Fourth Proportional to 7,191.81, 10,781.33 and 2,808.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,191.81 : 10,781.33 = 2,808.27 : x
2. Step 2: Convert to fraction form
   7,191.81/10,781.33 = 2,808.27/x
3. Step 3: Cross multiply
   7,191.81x = 10,781.33 × 2,808.27
4. Step 4: Simplify right side
   7,191.81x = 30,276,871.56
5. Step 5: Solve for x
   x = 30,276,871.56/7,191.81
6. Step 6: Final answer
   x = 4,209.91