Finding the Fourth Proportional to 10,619.91, 15,929.82 and 2,828.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,619.91 : 15,929.82 = 2,828.72 : x
2. Step 2: Convert to fraction form
   10,619.91/15,929.82 = 2,828.72/x
3. Step 3: Cross multiply
   10,619.91x = 15,929.82 × 2,828.72
4. Step 4: Simplify right side
   10,619.91x = 45,061,040.25
5. Step 5: Solve for x
   x = 45,061,040.25/10,619.91
6. Step 6: Final answer
   x = 4,243.07