Finding the Fourth Proportional to 1,986.62, 2,980.98 and 1,443.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.62 : 2,980.98 = 1,443.30 : x
2. Step 2: Convert to fraction form
   1,986.62/2,980.98 = 1,443.30/x
3. Step 3: Cross multiply
   1,986.62x = 2,980.98 × 1,443.30
4. Step 4: Simplify right side
   1,986.62x = 4,302,448.43
5. Step 5: Solve for x
   x = 4,302,448.43/1,986.62
6. Step 6: Final answer
   x = 2,165.71