Finding the Fourth Proportional to 10,105.04, 15,148.18 and 5,163.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105.04 : 15,148.18 = 5,163.78 : x
2. Step 2: Convert to fraction form
   10,105.04/15,148.18 = 5,163.78/x
3. Step 3: Cross multiply
   10,105.04x = 15,148.18 × 5,163.78
4. Step 4: Simplify right side
   10,105.04x = 78,221,843.10
5. Step 5: Solve for x
   x = 78,221,843.10/10,105.04
6. Step 6: Final answer
   x = 7,740.88