Finding the Fourth Proportional to 3,765.78, 5,196.90 and 2,087.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,765.78 : 5,196.90 = 2,087.28 : x
2. Step 2: Convert to fraction form
   3,765.78/5,196.90 = 2,087.28/x
3. Step 3: Cross multiply
   3,765.78x = 5,196.90 × 2,087.28
4. Step 4: Simplify right side
   3,765.78x = 10,847,385.43
5. Step 5: Solve for x
   x = 10,847,385.43/3,765.78
6. Step 6: Final answer
   x = 2,880.51