Finding the Fourth Proportional to 10,785.35, 16,148.77 and 5,580.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,785.35 : 16,148.77 = 5,580.29 : x
2. Step 2: Convert to fraction form
   10,785.35/16,148.77 = 5,580.29/x
3. Step 3: Cross multiply
   10,785.35x = 16,148.77 × 5,580.29
4. Step 4: Simplify right side
   10,785.35x = 90,114,846.16
5. Step 5: Solve for x
   x = 90,114,846.16/10,785.35
6. Step 6: Final answer
   x = 8,355.30