Finding the Fourth Proportional to 16,858.09, 23,272.91 and 12,315.67

Step by Step Solution

1. Step 1: Write the proportion equation
   16,858.09 : 23,272.91 = 12,315.67 : x
2. Step 2: Convert to fraction form
   16,858.09/23,272.91 = 12,315.67/x
3. Step 3: Cross multiply
   16,858.09x = 23,272.91 × 12,315.67
4. Step 4: Simplify right side
   16,858.09x = 286,621,479.50
5. Step 5: Solve for x
   x = 286,621,479.50/16,858.09
6. Step 6: Final answer
   x = 17,002.01