Finding the Fourth Proportional to 13,410.43, 18,506.81 and 7,442.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,410.43 : 18,506.81 = 7,442.55 : x
2. Step 2: Convert to fraction form
   13,410.43/18,506.81 = 7,442.55/x
3. Step 3: Cross multiply
   13,410.43x = 18,506.81 × 7,442.55
4. Step 4: Simplify right side
   13,410.43x = 137,737,877.37
5. Step 5: Solve for x
   x = 137,737,877.37/13,410.43
6. Step 6: Final answer
   x = 10,270.95