Finding the Fourth Proportional to 10,754.37, 16,145.37 and 8,290.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,754.37 : 16,145.37 = 8,290.89 : x
2. Step 2: Convert to fraction form
   10,754.37/16,145.37 = 8,290.89/x
3. Step 3: Cross multiply
   10,754.37x = 16,145.37 × 8,290.89
4. Step 4: Simplify right side
   10,754.37x = 133,859,486.68
5. Step 5: Solve for x
   x = 133,859,486.68/10,754.37
6. Step 6: Final answer
   x = 12,446.99