Finding the Fourth Proportional to 12,678.22, 19,007.61 and 12,053.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,678.22 : 19,007.61 = 12,053.71 : x
2. Step 2: Convert to fraction form
   12,678.22/19,007.61 = 12,053.71/x
3. Step 3: Cross multiply
   12,678.22x = 19,007.61 × 12,053.71
4. Step 4: Simplify right side
   12,678.22x = 229,112,218.73
5. Step 5: Solve for x
   x = 229,112,218.73/12,678.22
6. Step 6: Final answer
   x = 18,071.32