Finding the Fourth Proportional to 12,141.48, 16,756.57 and 7,665

Step by Step Solution

1. Step 1: Write the proportion equation
   12,141.48 : 16,756.57 = 7,665 : x
2. Step 2: Convert to fraction form
   12,141.48/16,756.57 = 7,665/x
3. Step 3: Cross multiply
   12,141.48x = 16,756.57 × 7,665
4. Step 4: Simplify right side
   12,141.48x = 128,439,109.05
5. Step 5: Solve for x
   x = 128,439,109.05/12,141.48
6. Step 6: Final answer
   x = 10,578.54