Finding the Fourth Proportional to 3,765.40, 5,196.60 and 2,086.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,765.40 : 5,196.60 = 2,086.88 : x
2. Step 2: Convert to fraction form
   3,765.40/5,196.60 = 2,086.88/x
3. Step 3: Cross multiply
   3,765.40x = 5,196.60 × 2,086.88
4. Step 4: Simplify right side
   3,765.40x = 10,844,654.63
5. Step 5: Solve for x
   x = 10,844,654.63/3,765.40
6. Step 6: Final answer
   x = 2,880.08