Finding the Fourth Proportional to 2,166.49, 2,989.76 and 1,171.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166.49 : 2,989.76 = 1,171.77 : x
2. Step 2: Convert to fraction form
   2,166.49/2,989.76 = 1,171.77/x
3. Step 3: Cross multiply
   2,166.49x = 2,989.76 × 1,171.77
4. Step 4: Simplify right side
   2,166.49x = 3,503,314.00
5. Step 5: Solve for x
   x = 3,503,314.00/2,166.49
6. Step 6: Final answer
   x = 1,617.05