Finding the Fourth Proportional to 13,022.29, 17,969.67 and 7,644.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,022.29 : 17,969.67 = 7,644.15 : x
2. Step 2: Convert to fraction form
   13,022.29/17,969.67 = 7,644.15/x
3. Step 3: Cross multiply
   13,022.29x = 17,969.67 × 7,644.15
4. Step 4: Simplify right side
   13,022.29x = 137,362,852.93
5. Step 5: Solve for x
   x = 137,362,852.93/13,022.29
6. Step 6: Final answer
   x = 10,548.29