Finding the Fourth Proportional to 2,885.05, 3,989.15 and 2,516.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,885.05 : 3,989.15 = 2,516.01 : x
2. Step 2: Convert to fraction form
   2,885.05/3,989.15 = 2,516.01/x
3. Step 3: Cross multiply
   2,885.05x = 3,989.15 × 2,516.01
4. Step 4: Simplify right side
   2,885.05x = 10,036,741.29
5. Step 5: Solve for x
   x = 10,036,741.29/2,885.05
6. Step 6: Final answer
   x = 3,478.88