Finding the Fourth Proportional to 3,788.31, 5,680.83 and 1,322.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.31 : 5,680.83 = 1,322.40 : x
2. Step 2: Convert to fraction form
   3,788.31/5,680.83 = 1,322.40/x
3. Step 3: Cross multiply
   3,788.31x = 5,680.83 × 1,322.40
4. Step 4: Simplify right side
   3,788.31x = 7,512,329.59
5. Step 5: Solve for x
   x = 7,512,329.59/3,788.31
6. Step 6: Final answer
   x = 1,983.03