Finding the Fourth Proportional to 16,856.64, 23,250.54 and 10,139.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16,856.64 : 23,250.54 = 10,139.82 : x
2. Step 2: Convert to fraction form
   16,856.64/23,250.54 = 10,139.82/x
3. Step 3: Cross multiply
   16,856.64x = 23,250.54 × 10,139.82
4. Step 4: Simplify right side
   16,856.64x = 235,756,339.43
5. Step 5: Solve for x
   x = 235,756,339.43/16,856.64
6. Step 6: Final answer
   x = 13,985.96