Finding the Fourth Proportional to 2,086.86, 3,131.83 and 1,680.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.86 : 3,131.83 = 1,680.89 : x
2. Step 2: Convert to fraction form
   2,086.86/3,131.83 = 1,680.89/x
3. Step 3: Cross multiply
   2,086.86x = 3,131.83 × 1,680.89
4. Step 4: Simplify right side
   2,086.86x = 5,264,261.73
5. Step 5: Solve for x
   x = 5,264,261.73/2,086.86
6. Step 6: Final answer
   x = 2,522.58