Finding the Fourth Proportional to 3,764.78, 5,195.32 and 2,086.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,764.78 : 5,195.32 = 2,086.18 : x
2. Step 2: Convert to fraction form
   3,764.78/5,195.32 = 2,086.18/x
3. Step 3: Cross multiply
   3,764.78x = 5,195.32 × 2,086.18
4. Step 4: Simplify right side
   3,764.78x = 10,838,366.21
5. Step 5: Solve for x
   x = 10,838,366.21/3,764.78
6. Step 6: Final answer
   x = 2,878.88