Finding the Fourth Proportional to 12,162.54, 18,236.12 and 5,138.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,162.54 : 18,236.12 = 5,138.94 : x
2. Step 2: Convert to fraction form
   12,162.54/18,236.12 = 5,138.94/x
3. Step 3: Cross multiply
   12,162.54x = 18,236.12 × 5,138.94
4. Step 4: Simplify right side
   12,162.54x = 93,714,300.82
5. Step 5: Solve for x
   x = 93,714,300.82/12,162.54
6. Step 6: Final answer
   x = 7,705.16