Finding the Fourth Proportional to 13,020.40, 17,969.25 and 7,356.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,020.40 : 17,969.25 = 7,356.18 : x
2. Step 2: Convert to fraction form
   13,020.40/17,969.25 = 7,356.18/x
3. Step 3: Cross multiply
   13,020.40x = 17,969.25 × 7,356.18
4. Step 4: Simplify right side
   13,020.40x = 132,185,111.75
5. Step 5: Solve for x
   x = 132,185,111.75/13,020.40
6. Step 6: Final answer
   x = 10,152.16