Finding the Fourth Proportional to 10,785.69, 16,148.43 and 5,509.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,785.69 : 16,148.43 = 5,509.35 : x
2. Step 2: Convert to fraction form
   10,785.69/16,148.43 = 5,509.35/x
3. Step 3: Cross multiply
   10,785.69x = 16,148.43 × 5,509.35
4. Step 4: Simplify right side
   10,785.69x = 88,967,352.82
5. Step 5: Solve for x
   x = 88,967,352.82/10,785.69
6. Step 6: Final answer
   x = 8,248.65