Finding the Fourth Proportional to 2,620, 3,615.72 and 1,441.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620 : 3,615.72 = 1,441.12 : x
2. Step 2: Convert to fraction form
   2,620/3,615.72 = 1,441.12/x
3. Step 3: Cross multiply
   2,620x = 3,615.72 × 1,441.12
4. Step 4: Simplify right side
   2,620x = 5,210,686.41
5. Step 5: Solve for x
   x = 5,210,686.41/2,620
6. Step 6: Final answer
   x = 1,988.81