Finding the Fourth Proportional to 12,007.82, 18,045.76 and 7,079.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,007.82 : 18,045.76 = 7,079.78 : x
2. Step 2: Convert to fraction form
   12,007.82/18,045.76 = 7,079.78/x
3. Step 3: Cross multiply
   12,007.82x = 18,045.76 × 7,079.78
4. Step 4: Simplify right side
   12,007.82x = 127,760,010.73
5. Step 5: Solve for x
   x = 127,760,010.73/12,007.82
6. Step 6: Final answer
   x = 10,639.73