Finding the Fourth Proportional to 3,680.16, 5,077.98 and 2,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.16 : 5,077.98 = 2,086.72 : x
2. Step 2: Convert to fraction form
   3,680.16/5,077.98 = 2,086.72/x
3. Step 3: Cross multiply
   3,680.16x = 5,077.98 × 2,086.72
4. Step 4: Simplify right side
   3,680.16x = 10,596,322.43
5. Step 5: Solve for x
   x = 10,596,322.43/3,680.16
6. Step 6: Final answer
   x = 2,879.31