Finding the Fourth Proportional to 9,426.72, 13,011.21 and 5,450.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,426.72 : 13,011.21 = 5,450.31 : x
2. Step 2: Convert to fraction form
   9,426.72/13,011.21 = 5,450.31/x
3. Step 3: Cross multiply
   9,426.72x = 13,011.21 × 5,450.31
4. Step 4: Simplify right side
   9,426.72x = 70,915,127.98
5. Step 5: Solve for x
   x = 70,915,127.98/9,426.72
6. Step 6: Final answer
   x = 7,522.78