Finding the Fourth Proportional to 16,518.52, 22,789.60 and 10,856.36

Step by Step Solution

1. Step 1: Write the proportion equation
   16,518.52 : 22,789.60 = 10,856.36 : x
2. Step 2: Convert to fraction form
   16,518.52/22,789.60 = 10,856.36/x
3. Step 3: Cross multiply
   16,518.52x = 22,789.60 × 10,856.36
4. Step 4: Simplify right side
   16,518.52x = 247,412,101.86
5. Step 5: Solve for x
   x = 247,412,101.86/16,518.52
6. Step 6: Final answer
   x = 14,977.86