Finding the Fourth Proportional to 3,765.88, 5,196.91 and 2,109.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,765.88 : 5,196.91 = 2,109.88 : x
2. Step 2: Convert to fraction form
   3,765.88/5,196.91 = 2,109.88/x
3. Step 3: Cross multiply
   3,765.88x = 5,196.91 × 2,109.88
4. Step 4: Simplify right side
   3,765.88x = 10,964,830.49
5. Step 5: Solve for x
   x = 10,964,830.49/3,765.88
6. Step 6: Final answer
   x = 2,911.63