Finding the Fourth Proportional to 9,642.56, 13,306.56 and 5,450.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,642.56 : 13,306.56 = 5,450.72 : x
2. Step 2: Convert to fraction form
   9,642.56/13,306.56 = 5,450.72/x
3. Step 3: Cross multiply
   9,642.56x = 13,306.56 × 5,450.72
4. Step 4: Simplify right side
   9,642.56x = 72,530,332.72
5. Step 5: Solve for x
   x = 72,530,332.72/9,642.56
6. Step 6: Final answer
   x = 7,521.90