Finding the Fourth Proportional to 16,856.50, 23,262.70 and 9,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,856.50 : 23,262.70 = 9,404.50 : x
2. Step 2: Convert to fraction form
   16,856.50/23,262.70 = 9,404.50/x
3. Step 3: Cross multiply
   16,856.50x = 23,262.70 × 9,404.50
4. Step 4: Simplify right side
   16,856.50x = 218,774,062.15
5. Step 5: Solve for x
   x = 218,774,062.15/16,856.50
6. Step 6: Final answer
   x = 12,978.62