Finding the Fourth Proportional to 19,571.88, 27,012.42 and 13,280.04

Step by Step Solution

1. Step 1: Write the proportion equation
   19,571.88 : 27,012.42 = 13,280.04 : x
2. Step 2: Convert to fraction form
   19,571.88/27,012.42 = 13,280.04/x
3. Step 3: Cross multiply
   19,571.88x = 27,012.42 × 13,280.04
4. Step 4: Simplify right side
   19,571.88x = 358,726,018.10
5. Step 5: Solve for x
   x = 358,726,018.10/19,571.88
6. Step 6: Final answer
   x = 18,328.64