Finding the Fourth Proportional to 3,788.48, 5,676.42 and 1,321.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.48 : 5,676.42 = 1,321.94 : x
2. Step 2: Convert to fraction form
   3,788.48/5,676.42 = 1,321.94/x
3. Step 3: Cross multiply
   3,788.48x = 5,676.42 × 1,321.94
4. Step 4: Simplify right side
   3,788.48x = 7,503,886.65
5. Step 5: Solve for x
   x = 7,503,886.65/3,788.48
6. Step 6: Final answer
   x = 1,980.71