Finding the Fourth Proportional to 9,421.72, 13,001.06 and 5,644.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,421.72 : 13,001.06 = 5,644.82 : x
2. Step 2: Convert to fraction form
   9,421.72/13,001.06 = 5,644.82/x
3. Step 3: Cross multiply
   9,421.72x = 13,001.06 × 5,644.82
4. Step 4: Simplify right side
   9,421.72x = 73,388,690.12
5. Step 5: Solve for x
   x = 73,388,690.12/9,421.72
6. Step 6: Final answer
   x = 7,789.31