Finding the Fourth Proportional to 3,080.72, 4,619.85 and 1,131.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,080.72 : 4,619.85 = 1,131.86 : x
2. Step 2: Convert to fraction form
   3,080.72/4,619.85 = 1,131.86/x
3. Step 3: Cross multiply
   3,080.72x = 4,619.85 × 1,131.86
4. Step 4: Simplify right side
   3,080.72x = 5,229,023.42
5. Step 5: Solve for x
   x = 5,229,023.42/3,080.72
6. Step 6: Final answer
   x = 1,697.34