Finding the Fourth Proportional to 3,648.06, 5,034.96 and 2,155.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,648.06 : 5,034.96 = 2,155.86 : x
2. Step 2: Convert to fraction form
   3,648.06/5,034.96 = 2,155.86/x
3. Step 3: Cross multiply
   3,648.06x = 5,034.96 × 2,155.86
4. Step 4: Simplify right side
   3,648.06x = 10,854,668.87
5. Step 5: Solve for x
   x = 10,854,668.87/3,648.06
6. Step 6: Final answer
   x = 2,975.46