Finding the Fourth Proportional to 16,685.48, 23,025.98 and 9,131.70

Step by Step Solution

1. Step 1: Write the proportion equation
   16,685.48 : 23,025.98 = 9,131.70 : x
2. Step 2: Convert to fraction form
   16,685.48/23,025.98 = 9,131.70/x
3. Step 3: Cross multiply
   16,685.48x = 23,025.98 × 9,131.70
4. Step 4: Simplify right side
   16,685.48x = 210,266,341.57
5. Step 5: Solve for x
   x = 210,266,341.57/16,685.48
6. Step 6: Final answer
   x = 12,601.76