Finding the Fourth Proportional to 3,930.72, 5,422.64 and 2,514.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.72 : 5,422.64 = 2,514.88 : x
2. Step 2: Convert to fraction form
   3,930.72/5,422.64 = 2,514.88/x
3. Step 3: Cross multiply
   3,930.72x = 5,422.64 × 2,514.88
4. Step 4: Simplify right side
   3,930.72x = 13,637,288.88
5. Step 5: Solve for x
   x = 13,637,288.88/3,930.72
6. Step 6: Final answer
   x = 3,469.41