Finding the Fourth Proportional to 13,017.72, 17,964.75 and 7,641.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,017.72 : 17,964.75 = 7,641.69 : x
2. Step 2: Convert to fraction form
   13,017.72/17,964.75 = 7,641.69/x
3. Step 3: Cross multiply
   13,017.72x = 17,964.75 × 7,641.69
4. Step 4: Simplify right side
   13,017.72x = 137,280,991.02
5. Step 5: Solve for x
   x = 137,280,991.02/13,017.72
6. Step 6: Final answer
   x = 10,545.70