Finding the Fourth Proportional to 3,910.58, 5,871.94 and 2,989.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.58 : 5,871.94 = 2,989.61 : x
2. Step 2: Convert to fraction form
   3,910.58/5,871.94 = 2,989.61/x
3. Step 3: Cross multiply
   3,910.58x = 5,871.94 × 2,989.61
4. Step 4: Simplify right side
   3,910.58x = 17,554,812.55
5. Step 5: Solve for x
   x = 17,554,812.55/3,910.58
6. Step 6: Final answer
   x = 4,489.06