Finding the Fourth Proportional to 10,103.45, 15,145.79 and 5,162.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,103.45 : 15,145.79 = 5,162.18 : x
2. Step 2: Convert to fraction form
   10,103.45/15,145.79 = 5,162.18/x
3. Step 3: Cross multiply
   10,103.45x = 15,145.79 × 5,162.18
4. Step 4: Simplify right side
   10,103.45x = 78,185,192.68
5. Step 5: Solve for x
   x = 78,185,192.68/10,103.45
6. Step 6: Final answer
   x = 7,738.47