Finding the Fourth Proportional to 14,477.31, 19,979.57 and 8,103.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,477.31 : 19,979.57 = 8,103.78 : x
2. Step 2: Convert to fraction form
   14,477.31/19,979.57 = 8,103.78/x
3. Step 3: Cross multiply
   14,477.31x = 19,979.57 × 8,103.78
4. Step 4: Simplify right side
   14,477.31x = 161,910,039.77
5. Step 5: Solve for x
   x = 161,910,039.77/14,477.31
6. Step 6: Final answer
   x = 11,183.71