Finding the Fourth Proportional to 13,410.71, 18,506.79 and 7,442.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,410.71 : 18,506.79 = 7,442.38 : x
2. Step 2: Convert to fraction form
   13,410.71/18,506.79 = 7,442.38/x
3. Step 3: Cross multiply
   13,410.71x = 18,506.79 × 7,442.38
4. Step 4: Simplify right side
   13,410.71x = 137,734,586.89
5. Step 5: Solve for x
   x = 137,734,586.89/13,410.71
6. Step 6: Final answer
   x = 10,270.49