Finding the Fourth Proportional to 10,978.56, 16,467.81 and 8,483.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.56 : 16,467.81 = 8,483.37 : x
2. Step 2: Convert to fraction form
   10,978.56/16,467.81 = 8,483.37/x
3. Step 3: Cross multiply
   10,978.56x = 16,467.81 × 8,483.37
4. Step 4: Simplify right side
   10,978.56x = 139,702,431.75
5. Step 5: Solve for x
   x = 139,702,431.75/10,978.56
6. Step 6: Final answer
   x = 12,725.02