Finding the Fourth Proportional to 12,318.30, 16,999.87 and 7,536.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,318.30 : 16,999.87 = 7,536.75 : x
2. Step 2: Convert to fraction form
   12,318.30/16,999.87 = 7,536.75/x
3. Step 3: Cross multiply
   12,318.30x = 16,999.87 × 7,536.75
4. Step 4: Simplify right side
   12,318.30x = 128,123,715.89
5. Step 5: Solve for x
   x = 128,123,715.89/12,318.30
6. Step 6: Final answer
   x = 10,401.09