Finding the Fourth Proportional to 13,706.67, 18,915.30 and 7,419.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,706.67 : 18,915.30 = 7,419.06 : x
2. Step 2: Convert to fraction form
   13,706.67/18,915.30 = 7,419.06/x
3. Step 3: Cross multiply
   13,706.67x = 18,915.30 × 7,419.06
4. Step 4: Simplify right side
   13,706.67x = 140,333,745.62
5. Step 5: Solve for x
   x = 140,333,745.62/13,706.67
6. Step 6: Final answer
   x = 10,238.35