Finding the Fourth Proportional to 3,846.69, 5,764.47 and 2,090.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,846.69 : 5,764.47 = 2,090.21 : x
2. Step 2: Convert to fraction form
   3,846.69/5,764.47 = 2,090.21/x
3. Step 3: Cross multiply
   3,846.69x = 5,764.47 × 2,090.21
4. Step 4: Simplify right side
   3,846.69x = 12,048,916.18
5. Step 5: Solve for x
   x = 12,048,916.18/3,846.69
6. Step 6: Final answer
   x = 3,132.28