Finding the Fourth Proportional to 10,384.58, 14,321.12 and 9,185.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,384.58 : 14,321.12 = 9,185.15 : x
2. Step 2: Convert to fraction form
   10,384.58/14,321.12 = 9,185.15/x
3. Step 3: Cross multiply
   10,384.58x = 14,321.12 × 9,185.15
4. Step 4: Simplify right side
   10,384.58x = 131,541,676.91
5. Step 5: Solve for x
   x = 131,541,676.91/10,384.58
6. Step 6: Final answer
   x = 12,667.02