Finding the Fourth Proportional to 13,105.86, 18,087.68 and 7,442.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.86 : 18,087.68 = 7,442.37 : x
2. Step 2: Convert to fraction form
   13,105.86/18,087.68 = 7,442.37/x
3. Step 3: Cross multiply
   13,105.86x = 18,087.68 × 7,442.37
4. Step 4: Simplify right side
   13,105.86x = 134,615,207.00
5. Step 5: Solve for x
   x = 134,615,207.00/13,105.86
6. Step 6: Final answer
   x = 10,271.38