Finding the Fourth Proportional to 3,994.02, 5,516.69 and 2,820.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,994.02 : 5,516.69 = 2,820.33 : x
2. Step 2: Convert to fraction form
   3,994.02/5,516.69 = 2,820.33/x
3. Step 3: Cross multiply
   3,994.02x = 5,516.69 × 2,820.33
4. Step 4: Simplify right side
   3,994.02x = 15,558,872.21
5. Step 5: Solve for x
   x = 15,558,872.21/3,994.02
6. Step 6: Final answer
   x = 3,895.54