Finding the Fourth Proportional to 13,236.89, 19,859.18 and 5,335.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,236.89 : 19,859.18 = 5,335.31 : x
2. Step 2: Convert to fraction form
   13,236.89/19,859.18 = 5,335.31/x
3. Step 3: Cross multiply
   13,236.89x = 19,859.18 × 5,335.31
4. Step 4: Simplify right side
   13,236.89x = 105,954,904.62
5. Step 5: Solve for x
   x = 105,954,904.62/13,236.89
6. Step 6: Final answer
   x = 8,004.52