Finding the Fourth Proportional to 13,100.92, 18,086.69 and 8,637.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.92 : 18,086.69 = 8,637.68 : x
2. Step 2: Convert to fraction form
   13,100.92/18,086.69 = 8,637.68/x
3. Step 3: Cross multiply
   13,100.92x = 18,086.69 × 8,637.68
4. Step 4: Simplify right side
   13,100.92x = 156,227,040.48
5. Step 5: Solve for x
   x = 156,227,040.48/13,100.92
6. Step 6: Final answer
   x = 11,924.89