Finding the Fourth Proportional to 9,425.72, 13,009.83 and 5,449.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,425.72 : 13,009.83 = 5,449.31 : x
2. Step 2: Convert to fraction form
   9,425.72/13,009.83 = 5,449.31/x
3. Step 3: Cross multiply
   9,425.72x = 13,009.83 × 5,449.31
4. Step 4: Simplify right side
   9,425.72x = 70,894,596.72
5. Step 5: Solve for x
   x = 70,894,596.72/9,425.72
6. Step 6: Final answer
   x = 7,521.40