Finding the Fourth Proportional to 13,392.29, 18,482.25 and 7,424.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,392.29 : 18,482.25 = 7,424.21 : x
2. Step 2: Convert to fraction form
   13,392.29/18,482.25 = 7,424.21/x
3. Step 3: Cross multiply
   13,392.29x = 18,482.25 × 7,424.21
4. Step 4: Simplify right side
   13,392.29x = 137,216,012.86
5. Step 5: Solve for x
   x = 137,216,012.86/13,392.29
6. Step 6: Final answer
   x = 10,245.90