Finding the Fourth Proportional to 13,706.72, 18,915.27 and 7,419.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,706.72 : 18,915.27 = 7,419.09 : x
2. Step 2: Convert to fraction form
   13,706.72/18,915.27 = 7,419.09/x
3. Step 3: Cross multiply
   13,706.72x = 18,915.27 × 7,419.09
4. Step 4: Simplify right side
   13,706.72x = 140,334,175.35
5. Step 5: Solve for x
   x = 140,334,175.35/13,706.72
6. Step 6: Final answer
   x = 10,238.35