Finding the Fourth Proportional to 2,182.89, 3,012.40 and 1,188.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.89 : 3,012.40 = 1,188.21 : x
2. Step 2: Convert to fraction form
   2,182.89/3,012.40 = 1,188.21/x
3. Step 3: Cross multiply
   2,182.89x = 3,012.40 × 1,188.21
4. Step 4: Simplify right side
   2,182.89x = 3,579,363.80
5. Step 5: Solve for x
   x = 3,579,363.80/2,182.89
6. Step 6: Final answer
   x = 1,639.74