Finding the Fourth Proportional to 3,765.81, 5,196.82 and 2,109.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,765.81 : 5,196.82 = 2,109.81 : x
2. Step 2: Convert to fraction form
   3,765.81/5,196.82 = 2,109.81/x
3. Step 3: Cross multiply
   3,765.81x = 5,196.82 × 2,109.81
4. Step 4: Simplify right side
   3,765.81x = 10,964,302.80
5. Step 5: Solve for x
   x = 10,964,302.80/3,765.81
6. Step 6: Final answer
   x = 2,911.54