Finding the Fourth Proportional to 13,706.89, 18,915.50 and 7,419.26

Step by Step Solution

1. Step 1: Write the proportion equation
   13,706.89 : 18,915.50 = 7,419.26 : x
2. Step 2: Convert to fraction form
   13,706.89/18,915.50 = 7,419.26/x
3. Step 3: Cross multiply
   13,706.89x = 18,915.50 × 7,419.26
4. Step 4: Simplify right side
   13,706.89x = 140,339,078.37
5. Step 5: Solve for x
   x = 140,339,078.37/13,706.89
6. Step 6: Final answer
   x = 10,238.58