Finding the Fourth Proportional to 13,410.86, 18,506.18 and 7,442.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,410.86 : 18,506.18 = 7,442.17 : x
2. Step 2: Convert to fraction form
   13,410.86/18,506.18 = 7,442.17/x
3. Step 3: Cross multiply
   13,410.86x = 18,506.18 × 7,442.17
4. Step 4: Simplify right side
   13,410.86x = 137,726,137.61
5. Step 5: Solve for x
   x = 137,726,137.61/13,410.86
6. Step 6: Final answer
   x = 10,269.75