Finding the Fourth Proportional to 3,788.15, 5,680.69 and 1,322.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.15 : 5,680.69 = 1,322.15 : x
2. Step 2: Convert to fraction form
   3,788.15/5,680.69 = 1,322.15/x
3. Step 3: Cross multiply
   3,788.15x = 5,680.69 × 1,322.15
4. Step 4: Simplify right side
   3,788.15x = 7,510,692.57
5. Step 5: Solve for x
   x = 7,510,692.57/3,788.15
6. Step 6: Final answer
   x = 1,982.68