Finding the Fourth Proportional to 13,410.53, 18,506.46 and 7,442.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,410.53 : 18,506.46 = 7,442.18 : x
2. Step 2: Convert to fraction form
   13,410.53/18,506.46 = 7,442.18/x
3. Step 3: Cross multiply
   13,410.53x = 18,506.46 × 7,442.18
4. Step 4: Simplify right side
   13,410.53x = 137,728,313.95
5. Step 5: Solve for x
   x = 137,728,313.95/13,410.53
6. Step 6: Final answer
   x = 10,270.17