Finding the Fourth Proportional to 17,685.12, 24,411.96 and 11,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,685.12 : 24,411.96 = 11,718.72 : x
2. Step 2: Convert to fraction form
   17,685.12/24,411.96 = 11,718.72/x
3. Step 3: Cross multiply
   17,685.12x = 24,411.96 × 11,718.72
4. Step 4: Simplify right side
   17,685.12x = 286,076,923.89
5. Step 5: Solve for x
   x = 286,076,923.89/17,685.12
6. Step 6: Final answer
   x = 16,176.14