Finding the Fourth Proportional to 2,579.48, 3,873.76 and 1,921.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.48 : 3,873.76 = 1,921.54 : x
2. Step 2: Convert to fraction form
   2,579.48/3,873.76 = 1,921.54/x
3. Step 3: Cross multiply
   2,579.48x = 3,873.76 × 1,921.54
4. Step 4: Simplify right side
   2,579.48x = 7,443,584.79
5. Step 5: Solve for x
   x = 7,443,584.79/2,579.48
6. Step 6: Final answer
   x = 2,885.69