Finding the Fourth Proportional to 19,868.06, 27,426.33 and 13,409.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,868.06 : 27,426.33 = 13,409.10 : x
2. Step 2: Convert to fraction form
   19,868.06/27,426.33 = 13,409.10/x
3. Step 3: Cross multiply
   19,868.06x = 27,426.33 × 13,409.10
4. Step 4: Simplify right side
   19,868.06x = 367,762,401.60
5. Step 5: Solve for x
   x = 367,762,401.60/19,868.06
6. Step 6: Final answer
   x = 18,510.23