Finding the Fourth Proportional to 12,164.99, 16,790.29 and 7,685.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,164.99 : 16,790.29 = 7,685.89 : x
2. Step 2: Convert to fraction form
   12,164.99/16,790.29 = 7,685.89/x
3. Step 3: Cross multiply
   12,164.99x = 16,790.29 × 7,685.89
4. Step 4: Simplify right side
   12,164.99x = 129,048,260.82
5. Step 5: Solve for x
   x = 129,048,260.82/12,164.99
6. Step 6: Final answer
   x = 10,608.17