Finding the Fourth Proportional to 2,182.62, 3,012.01 and 1,187.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.62 : 3,012.01 = 1,187.91 : x
2. Step 2: Convert to fraction form
   2,182.62/3,012.01 = 1,187.91/x
3. Step 3: Cross multiply
   2,182.62x = 3,012.01 × 1,187.91
4. Step 4: Simplify right side
   2,182.62x = 3,577,989.27
5. Step 5: Solve for x
   x = 3,577,989.27/2,182.62
6. Step 6: Final answer
   x = 1,639.31