Finding the Fourth Proportional to 16,685.41, 23,025.86 and 9,131.74

Step by Step Solution

1. Step 1: Write the proportion equation
   16,685.41 : 23,025.86 = 9,131.74 : x
2. Step 2: Convert to fraction form
   16,685.41/23,025.86 = 9,131.74/x
3. Step 3: Cross multiply
   16,685.41x = 23,025.86 × 9,131.74
4. Step 4: Simplify right side
   16,685.41x = 210,266,166.80
5. Step 5: Solve for x
   x = 210,266,166.80/16,685.41
6. Step 6: Final answer
   x = 12,601.80