Finding the Fourth Proportional to 3,644.27, 5,471.52 and 1,866.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,644.27 : 5,471.52 = 1,866.61 : x
2. Step 2: Convert to fraction form
   3,644.27/5,471.52 = 1,866.61/x
3. Step 3: Cross multiply
   3,644.27x = 5,471.52 × 1,866.61
4. Step 4: Simplify right side
   3,644.27x = 10,213,186.45
5. Step 5: Solve for x
   x = 10,213,186.45/3,644.27
6. Step 6: Final answer
   x = 2,802.53