Finding the Fourth Proportional to 15,280.38, 21,089.88 and 9,965.97

Step by Step Solution

1. Step 1: Write the proportion equation
   15,280.38 : 21,089.88 = 9,965.97 : x
2. Step 2: Convert to fraction form
   15,280.38/21,089.88 = 9,965.97/x
3. Step 3: Cross multiply
   15,280.38x = 21,089.88 × 9,965.97
4. Step 4: Simplify right side
   15,280.38x = 210,181,111.38
5. Step 5: Solve for x
   x = 210,181,111.38/15,280.38
6. Step 6: Final answer
   x = 13,754.97