Finding the Fourth Proportional to 9,422.72, 13,002.56 and 5,230.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,422.72 : 13,002.56 = 5,230.72 : x
2. Step 2: Convert to fraction form
   9,422.72/13,002.56 = 5,230.72/x
3. Step 3: Cross multiply
   9,422.72x = 13,002.56 × 5,230.72
4. Step 4: Simplify right side
   9,422.72x = 68,012,750.64
5. Step 5: Solve for x
   x = 68,012,750.64/9,422.72
6. Step 6: Final answer
   x = 7,217.95