Finding the Fourth Proportional to 5,080.69, 7,012.71 and 3,091.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,080.69 : 7,012.71 = 3,091.90 : x
2. Step 2: Convert to fraction form
   5,080.69/7,012.71 = 3,091.90/x
3. Step 3: Cross multiply
   5,080.69x = 7,012.71 × 3,091.90
4. Step 4: Simplify right side
   5,080.69x = 21,682,598.05
5. Step 5: Solve for x
   x = 21,682,598.05/5,080.69
6. Step 6: Final answer
   x = 4,267.65