Finding the Fourth Proportional to 3,680.63, 5,520.03 and 1,083.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.63 : 5,520.03 = 1,083.57 : x
2. Step 2: Convert to fraction form
   3,680.63/5,520.03 = 1,083.57/x
3. Step 3: Cross multiply
   3,680.63x = 5,520.03 × 1,083.57
4. Step 4: Simplify right side
   3,680.63x = 5,981,338.91
5. Step 5: Solve for x
   x = 5,981,338.91/3,680.63
6. Step 6: Final answer
   x = 1,625.09