Finding the Fourth Proportional to 3,683.72, 5,081.72 and 2,191.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,683.72 : 5,081.72 = 2,191.16 : x
2. Step 2: Convert to fraction form
   3,683.72/5,081.72 = 2,191.16/x
3. Step 3: Cross multiply
   3,683.72x = 5,081.72 × 2,191.16
4. Step 4: Simplify right side
   3,683.72x = 11,134,861.60
5. Step 5: Solve for x
   x = 11,134,861.60/3,683.72
6. Step 6: Final answer
   x = 3,022.72