Finding the Fourth Proportional to 2,880.50, 4,322.73 and 1,320.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.50 : 4,322.73 = 1,320.67 : x
2. Step 2: Convert to fraction form
   2,880.50/4,322.73 = 1,320.67/x
3. Step 3: Cross multiply
   2,880.50x = 4,322.73 × 1,320.67
4. Step 4: Simplify right side
   2,880.50x = 5,708,910.19
5. Step 5: Solve for x
   x = 5,708,910.19/2,880.50
6. Step 6: Final answer
   x = 1,981.92