Finding the Fourth Proportional to 13,013.33, 19,532.95 and 7,172.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,013.33 : 19,532.95 = 7,172.69 : x
2. Step 2: Convert to fraction form
   13,013.33/19,532.95 = 7,172.69/x
3. Step 3: Cross multiply
   13,013.33x = 19,532.95 × 7,172.69
4. Step 4: Simplify right side
   13,013.33x = 140,103,679.54
5. Step 5: Solve for x
   x = 140,103,679.54/13,013.33
6. Step 6: Final answer
   x = 10,766.17