Finding the Fourth Proportional to 12,488.27, 18,641.30 and 10,911.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.27 : 18,641.30 = 10,911.83 : x
2. Step 2: Convert to fraction form
   12,488.27/18,641.30 = 10,911.83/x
3. Step 3: Cross multiply
   12,488.27x = 18,641.30 × 10,911.83
4. Step 4: Simplify right side
   12,488.27x = 203,410,715.90
5. Step 5: Solve for x
   x = 203,410,715.90/12,488.27
6. Step 6: Final answer
   x = 16,288.15