Finding the Fourth Proportional to 16,860.11, 23,275.69 and 12,317.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16,860.11 : 23,275.69 = 12,317.69 : x
2. Step 2: Convert to fraction form
   16,860.11/23,275.69 = 12,317.69/x
3. Step 3: Cross multiply
   16,860.11x = 23,275.69 × 12,317.69
4. Step 4: Simplify right side
   16,860.11x = 286,702,706.56
5. Step 5: Solve for x
   x = 286,702,706.56/16,860.11
6. Step 6: Final answer
   x = 17,004.80