Finding the Fourth Proportional to 13,074.18, 18,042.12 and 7,105.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,074.18 : 18,042.12 = 7,105.86 : x
2. Step 2: Convert to fraction form
   13,074.18/18,042.12 = 7,105.86/x
3. Step 3: Cross multiply
   13,074.18x = 18,042.12 × 7,105.86
4. Step 4: Simplify right side
   13,074.18x = 128,204,778.82
5. Step 5: Solve for x
   x = 128,204,778.82/13,074.18
6. Step 6: Final answer
   x = 9,805.95