Finding the Fourth Proportional to 16,585.76, 22,917.50 and 13,256.06

Step by Step Solution

1. Step 1: Write the proportion equation
   16,585.76 : 22,917.50 = 13,256.06 : x
2. Step 2: Convert to fraction form
   16,585.76/22,917.50 = 13,256.06/x
3. Step 3: Cross multiply
   16,585.76x = 22,917.50 × 13,256.06
4. Step 4: Simplify right side
   16,585.76x = 303,795,623.89
5. Step 5: Solve for x
   x = 303,795,623.89/16,585.76
6. Step 6: Final answer
   x = 18,316.65