Finding the Fourth Proportional to 12,800.98, 17,665.38 and 7,424.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,800.98 : 17,665.38 = 7,424.45 : x
2. Step 2: Convert to fraction form
   12,800.98/17,665.38 = 7,424.45/x
3. Step 3: Cross multiply
   12,800.98x = 17,665.38 × 7,424.45
4. Step 4: Simplify right side
   12,800.98x = 131,155,736.30
5. Step 5: Solve for x
   x = 131,155,736.30/12,800.98
6. Step 6: Final answer
   x = 10,245.76