Finding the Fourth Proportional to 23,819.81, 32,870.21 and 13,209.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,819.81 : 32,870.21 = 13,209.21 : x
2. Step 2: Convert to fraction form
   23,819.81/32,870.21 = 13,209.21/x
3. Step 3: Cross multiply
   23,819.81x = 32,870.21 × 13,209.21
4. Step 4: Simplify right side
   23,819.81x = 434,189,440.59
5. Step 5: Solve for x
   x = 434,189,440.59/23,819.81
6. Step 6: Final answer
   x = 18,228.09