Finding the Fourth Proportional to 13,906.18, 20,859.34 and 3,517.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.18 : 20,859.34 = 3,517.94 : x
2. Step 2: Convert to fraction form
   13,906.18/20,859.34 = 3,517.94/x
3. Step 3: Cross multiply
   13,906.18x = 20,859.34 × 3,517.94
4. Step 4: Simplify right side
   13,906.18x = 73,381,906.56
5. Step 5: Solve for x
   x = 73,381,906.56/13,906.18
6. Step 6: Final answer
   x = 5,276.93