Finding the Fourth Proportional to 13,678.56, 18,873.72 and 8,089.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,678.56 : 18,873.72 = 8,089.92 : x
2. Step 2: Convert to fraction form
   13,678.56/18,873.72 = 8,089.92/x
3. Step 3: Cross multiply
   13,678.56x = 18,873.72 × 8,089.92
4. Step 4: Simplify right side
   13,678.56x = 152,686,884.90
5. Step 5: Solve for x
   x = 152,686,884.90/13,678.56
6. Step 6: Final answer
   x = 11,162.50