Finding the Fourth Proportional to 16,991.39, 23,449.96 and 10,280.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,991.39 : 23,449.96 = 10,280.72 : x
2. Step 2: Convert to fraction form
   16,991.39/23,449.96 = 10,280.72/x
3. Step 3: Cross multiply
   16,991.39x = 23,449.96 × 10,280.72
4. Step 4: Simplify right side
   16,991.39x = 241,082,355.52
5. Step 5: Solve for x
   x = 241,082,355.52/16,991.39
6. Step 6: Final answer
   x = 14,188.51