Finding the Fourth Proportional to 11,433.18, 15,780.24 and 7,447.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,433.18 : 15,780.24 = 7,447.18 : x
2. Step 2: Convert to fraction form
   11,433.18/15,780.24 = 7,447.18/x
3. Step 3: Cross multiply
   11,433.18x = 15,780.24 × 7,447.18
4. Step 4: Simplify right side
   11,433.18x = 117,518,287.72
5. Step 5: Solve for x
   x = 117,518,287.72/11,433.18
6. Step 6: Final answer
   x = 10,278.71