Finding the Fourth Proportional to 9,429.72, 13,012.95 and 5,450.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,429.72 : 13,012.95 = 5,450.79 : x
2. Step 2: Convert to fraction form
   9,429.72/13,012.95 = 5,450.79/x
3. Step 3: Cross multiply
   9,429.72x = 13,012.95 × 5,450.79
4. Step 4: Simplify right side
   9,429.72x = 70,930,926.97
5. Step 5: Solve for x
   x = 70,930,926.97/9,429.72
6. Step 6: Final answer
   x = 7,522.06