Finding the Fourth Proportional to 3,899.57, 5,851.37 and 2,981.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.57 : 5,851.37 = 2,981.03 : x
2. Step 2: Convert to fraction form
   3,899.57/5,851.37 = 2,981.03/x
3. Step 3: Cross multiply
   3,899.57x = 5,851.37 × 2,981.03
4. Step 4: Simplify right side
   3,899.57x = 17,443,087.71
5. Step 5: Solve for x
   x = 17,443,087.71/3,899.57
6. Step 6: Final answer
   x = 4,473.09