Finding the Fourth Proportional to 2,182.81, 3,012.18 and 1,188.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.81 : 3,012.18 = 1,188.03 : x
2. Step 2: Convert to fraction form
   2,182.81/3,012.18 = 1,188.03/x
3. Step 3: Cross multiply
   2,182.81x = 3,012.18 × 1,188.03
4. Step 4: Simplify right side
   2,182.81x = 3,578,560.21
5. Step 5: Solve for x
   x = 3,578,560.21/2,182.81
6. Step 6: Final answer
   x = 1,639.43