Finding the Fourth Proportional to 12,249.72, 16,904.31 and 7,146.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,249.72 : 16,904.31 = 7,146.21 : x
2. Step 2: Convert to fraction form
   12,249.72/16,904.31 = 7,146.21/x
3. Step 3: Cross multiply
   12,249.72x = 16,904.31 × 7,146.21
4. Step 4: Simplify right side
   12,249.72x = 120,801,812.56
5. Step 5: Solve for x
   x = 120,801,812.56/12,249.72
6. Step 6: Final answer
   x = 9,861.60