Finding the Fourth Proportional to 3,648.57, 5,034.81 and 2,156.13

Step by Step Solution

1. Step 1: Write the proportion equation
   3,648.57 : 5,034.81 = 2,156.13 : x
2. Step 2: Convert to fraction form
   3,648.57/5,034.81 = 2,156.13/x
3. Step 3: Cross multiply
   3,648.57x = 5,034.81 × 2,156.13
4. Step 4: Simplify right side
   3,648.57x = 10,855,704.89
5. Step 5: Solve for x
   x = 10,855,704.89/3,648.57
6. Step 6: Final answer
   x = 2,975.33