Finding the Fourth Proportional to 2,720.39, 4,081.69 and 1,076.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,720.39 : 4,081.69 = 1,076.49 : x
2. Step 2: Convert to fraction form
   2,720.39/4,081.69 = 1,076.49/x
3. Step 3: Cross multiply
   2,720.39x = 4,081.69 × 1,076.49
4. Step 4: Simplify right side
   2,720.39x = 4,393,899.81
5. Step 5: Solve for x
   x = 4,393,899.81/2,720.39
6. Step 6: Final answer
   x = 1,615.18