Finding the Fourth Proportional to 3,870, 5,805.72 and 1,818

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870 : 5,805.72 = 1,818 : x
2. Step 2: Convert to fraction form
   3,870/5,805.72 = 1,818/x
3. Step 3: Cross multiply
   3,870x = 5,805.72 × 1,818
4. Step 4: Simplify right side
   3,870x = 10,554,798.96
5. Step 5: Solve for x
   x = 10,554,798.96/3,870
6. Step 6: Final answer
   x = 2,727.34