Finding the Fourth Proportional to 3,131.69, 4,699.42 and 1,818

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.69 : 4,699.42 = 1,818 : x
2. Step 2: Convert to fraction form
   3,131.69/4,699.42 = 1,818/x
3. Step 3: Cross multiply
   3,131.69x = 4,699.42 × 1,818
4. Step 4: Simplify right side
   3,131.69x = 8,543,541.02
5. Step 5: Solve for x
   x = 8,543,541.02/3,131.69
6. Step 6: Final answer
   x = 2,728.10