Finding the Fourth Proportional to 13,257.34, 19,885.55 and 3,396.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,257.34 : 19,885.55 = 3,396.71 : x
2. Step 2: Convert to fraction form
   13,257.34/19,885.55 = 3,396.71/x
3. Step 3: Cross multiply
   13,257.34x = 19,885.55 × 3,396.71
4. Step 4: Simplify right side
   13,257.34x = 67,545,446.54
5. Step 5: Solve for x
   x = 67,545,446.54/13,257.34
6. Step 6: Final answer
   x = 5,094.95