Finding the Fourth Proportional to 11,280.04, 16,929.78 and 7,819.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,280.04 : 16,929.78 = 7,819.72 : x
2. Step 2: Convert to fraction form
   11,280.04/16,929.78 = 7,819.72/x
3. Step 3: Cross multiply
   11,280.04x = 16,929.78 × 7,819.72
4. Step 4: Simplify right side
   11,280.04x = 132,386,139.26
5. Step 5: Solve for x
   x = 132,386,139.26/11,280.04
6. Step 6: Final answer
   x = 11,736.32