Finding the Fourth Proportional to 2,087.79, 2,881.88 and 1,291.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.79 : 2,881.88 = 1,291.73 : x
2. Step 2: Convert to fraction form
   2,087.79/2,881.88 = 1,291.73/x
3. Step 3: Cross multiply
   2,087.79x = 2,881.88 × 1,291.73
4. Step 4: Simplify right side
   2,087.79x = 3,722,610.85
5. Step 5: Solve for x
   x = 3,722,610.85/2,087.79
6. Step 6: Final answer
   x = 1,783.04