Finding the Fourth Proportional to 2,648.25, 3,967.21 and 1,415.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.25 : 3,967.21 = 1,415.23 : x
2. Step 2: Convert to fraction form
   2,648.25/3,967.21 = 1,415.23/x
3. Step 3: Cross multiply
   2,648.25x = 3,967.21 × 1,415.23
4. Step 4: Simplify right side
   2,648.25x = 5,614,514.61
5. Step 5: Solve for x
   x = 5,614,514.61/2,648.25
6. Step 6: Final answer
   x = 2,120.08