Finding the Fourth Proportional to 3,080.69, 4,250.72 and 1,821.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,080.69 : 4,250.72 = 1,821.12 : x
2. Step 2: Convert to fraction form
   3,080.69/4,250.72 = 1,821.12/x
3. Step 3: Cross multiply
   3,080.69x = 4,250.72 × 1,821.12
4. Step 4: Simplify right side
   3,080.69x = 7,741,071.21
5. Step 5: Solve for x
   x = 7,741,071.21/3,080.69
6. Step 6: Final answer
   x = 2,512.77