Finding the Fourth Proportional to 13,914.72, 20,858.04 and 8,724.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,914.72 : 20,858.04 = 8,724.24 : x
2. Step 2: Convert to fraction form
   13,914.72/20,858.04 = 8,724.24/x
3. Step 3: Cross multiply
   13,914.72x = 20,858.04 × 8,724.24
4. Step 4: Simplify right side
   13,914.72x = 181,970,546.89
5. Step 5: Solve for x
   x = 181,970,546.89/13,914.72
6. Step 6: Final answer
   x = 13,077.56