Finding the Fourth Proportional to 3,991.16, 5,985.42 and 1,682.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.16 : 5,985.42 = 1,682.12 : x
2. Step 2: Convert to fraction form
   3,991.16/5,985.42 = 1,682.12/x
3. Step 3: Cross multiply
   3,991.16x = 5,985.42 × 1,682.12
4. Step 4: Simplify right side
   3,991.16x = 10,068,194.69
5. Step 5: Solve for x
   x = 10,068,194.69/3,991.16
6. Step 6: Final answer
   x = 2,522.62