Finding the Fourth Proportional to 10,648.26, 15,978.33 and 4,412.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,648.26 : 15,978.33 = 4,412.88 : x
2. Step 2: Convert to fraction form
   10,648.26/15,978.33 = 4,412.88/x
3. Step 3: Cross multiply
   10,648.26x = 15,978.33 × 4,412.88
4. Step 4: Simplify right side
   10,648.26x = 70,510,452.89
5. Step 5: Solve for x
   x = 70,510,452.89/10,648.26
6. Step 6: Final answer
   x = 6,621.78