Finding the Fourth Proportional to 12,072.56, 16,642.69 and 8,476.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,072.56 : 16,642.69 = 8,476.57 : x
2. Step 2: Convert to fraction form
   12,072.56/16,642.69 = 8,476.57/x
3. Step 3: Cross multiply
   12,072.56x = 16,642.69 × 8,476.57
4. Step 4: Simplify right side
   12,072.56x = 141,072,926.77
5. Step 5: Solve for x
   x = 141,072,926.77/12,072.56
6. Step 6: Final answer
   x = 11,685.42