Finding the Fourth Proportional to 1,871.61, 2,582.59 and 1,163.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.61 : 2,582.59 = 1,163.57 : x
2. Step 2: Convert to fraction form
   1,871.61/2,582.59 = 1,163.57/x
3. Step 3: Cross multiply
   1,871.61x = 2,582.59 × 1,163.57
4. Step 4: Simplify right side
   1,871.61x = 3,005,018.43
5. Step 5: Solve for x
   x = 3,005,018.43/1,871.61
6. Step 6: Final answer
   x = 1,605.58