Finding the Fourth Proportional to 12,863.88, 19,191.87 and 10,993.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,863.88 : 19,191.87 = 10,993.32 : x
2. Step 2: Convert to fraction form
   12,863.88/19,191.87 = 10,993.32/x
3. Step 3: Cross multiply
   12,863.88x = 19,191.87 × 10,993.32
4. Step 4: Simplify right side
   12,863.88x = 210,982,368.31
5. Step 5: Solve for x
   x = 210,982,368.31/12,863.88
6. Step 6: Final answer
   x = 16,401.15