Finding the Fourth Proportional to 12,079.31, 16,663.78 and 8,544.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,079.31 : 16,663.78 = 8,544.47 : x
2. Step 2: Convert to fraction form
   12,079.31/16,663.78 = 8,544.47/x
3. Step 3: Cross multiply
   12,079.31x = 16,663.78 × 8,544.47
4. Step 4: Simplify right side
   12,079.31x = 142,383,188.59
5. Step 5: Solve for x
   x = 142,383,188.59/12,079.31
6. Step 6: Final answer
   x = 11,787.36