Finding the Fourth Proportional to 1,986.14, 2,740.78 and 1,189.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.14 : 2,740.78 = 1,189.82 : x
2. Step 2: Convert to fraction form
   1,986.14/2,740.78 = 1,189.82/x
3. Step 3: Cross multiply
   1,986.14x = 2,740.78 × 1,189.82
4. Step 4: Simplify right side
   1,986.14x = 3,261,034.86
5. Step 5: Solve for x
   x = 3,261,034.86/1,986.14
6. Step 6: Final answer
   x = 1,641.90