Finding the Fourth Proportional to 3,653.61, 5,042.31 and 2,081.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,653.61 : 5,042.31 = 2,081.79 : x
2. Step 2: Convert to fraction form
   3,653.61/5,042.31 = 2,081.79/x
3. Step 3: Cross multiply
   3,653.61x = 5,042.31 × 2,081.79
4. Step 4: Simplify right side
   3,653.61x = 10,497,030.53
5. Step 5: Solve for x
   x = 10,497,030.53/3,653.61
6. Step 6: Final answer
   x = 2,873.06