Finding the Fourth Proportional to 13,281, 19,908.12 and 8,354.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,281 : 19,908.12 = 8,354.16 : x
2. Step 2: Convert to fraction form
   13,281/19,908.12 = 8,354.16/x
3. Step 3: Cross multiply
   13,281x = 19,908.12 × 8,354.16
4. Step 4: Simplify right side
   13,281x = 166,315,619.78
5. Step 5: Solve for x
   x = 166,315,619.78/13,281
6. Step 6: Final answer
   x = 12,522.82