Finding the Fourth Proportional to 2,013.82, 3,019.21 and 1,320.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.82 : 3,019.21 = 1,320.67 : x
2. Step 2: Convert to fraction form
   2,013.82/3,019.21 = 1,320.67/x
3. Step 3: Cross multiply
   2,013.82x = 3,019.21 × 1,320.67
4. Step 4: Simplify right side
   2,013.82x = 3,987,380.07
5. Step 5: Solve for x
   x = 3,987,380.07/2,013.82
6. Step 6: Final answer
   x = 1,980.01