Finding the Fourth Proportional to 17,871.72, 24,665.93 and 9,916.51

Step by Step Solution

1. Step 1: Write the proportion equation
   17,871.72 : 24,665.93 = 9,916.51 : x
2. Step 2: Convert to fraction form
   17,871.72/24,665.93 = 9,916.51/x
3. Step 3: Cross multiply
   17,871.72x = 24,665.93 × 9,916.51
4. Step 4: Simplify right side
   17,871.72x = 244,599,904.63
5. Step 5: Solve for x
   x = 244,599,904.63/17,871.72
6. Step 6: Final answer
   x = 13,686.42