Finding the Fourth Proportional to 2,638.54, 3,643.28 and 2,048.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.54 : 3,643.28 = 2,048.05 : x
2. Step 2: Convert to fraction form
   2,638.54/3,643.28 = 2,048.05/x
3. Step 3: Cross multiply
   2,638.54x = 3,643.28 × 2,048.05
4. Step 4: Simplify right side
   2,638.54x = 7,461,619.60
5. Step 5: Solve for x
   x = 7,461,619.60/2,638.54
6. Step 6: Final answer
   x = 2,827.93