Finding the Fourth Proportional to 13,693.76, 20,540.69 and 3,305.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,693.76 : 20,540.69 = 3,305.51 : x
2. Step 2: Convert to fraction form
   13,693.76/20,540.69 = 3,305.51/x
3. Step 3: Cross multiply
   13,693.76x = 20,540.69 × 3,305.51
4. Step 4: Simplify right side
   13,693.76x = 67,897,426.39
5. Step 5: Solve for x
   x = 67,897,426.39/13,693.76
6. Step 6: Final answer
   x = 4,958.28