Finding the Fourth Proportional to 3,991.78, 5,987.91 and 1,682.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.78 : 5,987.91 = 1,682.50 : x
2. Step 2: Convert to fraction form
   3,991.78/5,987.91 = 1,682.50/x
3. Step 3: Cross multiply
   3,991.78x = 5,987.91 × 1,682.50
4. Step 4: Simplify right side
   3,991.78x = 10,074,658.58
5. Step 5: Solve for x
   x = 10,074,658.58/3,991.78
6. Step 6: Final answer
   x = 2,523.85