Finding the Fourth Proportional to 19,382.69, 28,942.76 and 15,389.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,382.69 : 28,942.76 = 15,389.15 : x
2. Step 2: Convert to fraction form
   19,382.69/28,942.76 = 15,389.15/x
3. Step 3: Cross multiply
   19,382.69x = 28,942.76 × 15,389.15
4. Step 4: Simplify right side
   19,382.69x = 445,404,368.81
5. Step 5: Solve for x
   x = 445,404,368.81/19,382.69
6. Step 6: Final answer
   x = 22,979.49