Finding the Fourth Proportional to 2,087.84, 2,881.47 and 1,291.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.84 : 2,881.47 = 1,291.69 : x
2. Step 2: Convert to fraction form
   2,087.84/2,881.47 = 1,291.69/x
3. Step 3: Cross multiply
   2,087.84x = 2,881.47 × 1,291.69
4. Step 4: Simplify right side
   2,087.84x = 3,721,967.16
5. Step 5: Solve for x
   x = 3,721,967.16/2,087.84
6. Step 6: Final answer
   x = 1,782.69