Finding the Fourth Proportional to 16,856.19, 23,257.50 and 10,886.83

Step by Step Solution

1. Step 1: Write the proportion equation
   16,856.19 : 23,257.50 = 10,886.83 : x
2. Step 2: Convert to fraction form
   16,856.19/23,257.50 = 10,886.83/x
3. Step 3: Cross multiply
   16,856.19x = 23,257.50 × 10,886.83
4. Step 4: Simplify right side
   16,856.19x = 253,200,349.76
5. Step 5: Solve for x
   x = 253,200,349.76/16,856.19
6. Step 6: Final answer
   x = 15,021.21