Finding the Fourth Proportional to 16,928.60, 23,365.53 and 9,859.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,928.60 : 23,365.53 = 9,859.05 : x
2. Step 2: Convert to fraction form
   16,928.60/23,365.53 = 9,859.05/x
3. Step 3: Cross multiply
   16,928.60x = 23,365.53 × 9,859.05
4. Step 4: Simplify right side
   16,928.60x = 230,361,928.55
5. Step 5: Solve for x
   x = 230,361,928.55/16,928.60
6. Step 6: Final answer
   x = 13,607.86