Finding the Fourth Proportional to 13,705, 18,912.90 and 7,417.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,705 : 18,912.90 = 7,417.42 : x
2. Step 2: Convert to fraction form
   13,705/18,912.90 = 7,417.42/x
3. Step 3: Cross multiply
   13,705x = 18,912.90 × 7,417.42
4. Step 4: Simplify right side
   13,705x = 140,284,922.72
5. Step 5: Solve for x
   x = 140,284,922.72/13,705
6. Step 6: Final answer
   x = 10,236.04