Finding the Fourth Proportional to 10,439.37, 15,658.74 and 2,648.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,439.37 : 15,658.74 = 2,648.18 : x
2. Step 2: Convert to fraction form
   10,439.37/15,658.74 = 2,648.18/x
3. Step 3: Cross multiply
   10,439.37x = 15,658.74 × 2,648.18
4. Step 4: Simplify right side
   10,439.37x = 41,467,083.80
5. Step 5: Solve for x
   x = 41,467,083.80/10,439.37
6. Step 6: Final answer
   x = 3,972.18