Finding the Fourth Proportional to 12,456.56, 18,593.74 and 10,980.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.56 : 18,593.74 = 10,980.38 : x
2. Step 2: Convert to fraction form
   12,456.56/18,593.74 = 10,980.38/x
3. Step 3: Cross multiply
   12,456.56x = 18,593.74 × 10,980.38
4. Step 4: Simplify right side
   12,456.56x = 204,166,330.82
5. Step 5: Solve for x
   x = 204,166,330.82/12,456.56
6. Step 6: Final answer
   x = 16,390.27