Finding the Fourth Proportional to 1,987.74, 2,738.61 and 1,489.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.74 : 2,738.61 = 1,489.59 : x
2. Step 2: Convert to fraction form
   1,987.74/2,738.61 = 1,489.59/x
3. Step 3: Cross multiply
   1,987.74x = 2,738.61 × 1,489.59
4. Step 4: Simplify right side
   1,987.74x = 4,079,406.07
5. Step 5: Solve for x
   x = 4,079,406.07/1,987.74
6. Step 6: Final answer
   x = 2,052.28