Finding the Fourth Proportional to 13,856.58, 19,116.42 and 10,231.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,856.58 : 19,116.42 = 10,231.32 : x
2. Step 2: Convert to fraction form
   13,856.58/19,116.42 = 10,231.32/x
3. Step 3: Cross multiply
   13,856.58x = 19,116.42 × 10,231.32
4. Step 4: Simplify right side
   13,856.58x = 195,586,138.59
5. Step 5: Solve for x
   x = 195,586,138.59/13,856.58
6. Step 6: Final answer
   x = 14,115.03