Finding the Fourth Proportional to 9,422.28, 13,002.72 and 5,230.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,422.28 : 13,002.72 = 5,230.62 : x
2. Step 2: Convert to fraction form
   9,422.28/13,002.72 = 5,230.62/x
3. Step 3: Cross multiply
   9,422.28x = 13,002.72 × 5,230.62
4. Step 4: Simplify right side
   9,422.28x = 68,012,287.29
5. Step 5: Solve for x
   x = 68,012,287.29/9,422.28
6. Step 6: Final answer
   x = 7,218.24