Finding the Fourth Proportional to 13,705.69, 18,913.82 and 7,418.07

Step by Step Solution

1. Step 1: Write the proportion equation
   13,705.69 : 18,913.82 = 7,418.07 : x
2. Step 2: Convert to fraction form
   13,705.69/18,913.82 = 7,418.07/x
3. Step 3: Cross multiply
   13,705.69x = 18,913.82 × 7,418.07
4. Step 4: Simplify right side
   13,705.69x = 140,304,040.73
5. Step 5: Solve for x
   x = 140,304,040.73/13,705.69
6. Step 6: Final answer
   x = 10,236.92