Finding the Fourth Proportional to 19,861.62, 27,408.56 and 10,909.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,861.62 : 27,408.56 = 10,909.10 : x
2. Step 2: Convert to fraction form
   19,861.62/27,408.56 = 10,909.10/x
3. Step 3: Cross multiply
   19,861.62x = 27,408.56 × 10,909.10
4. Step 4: Simplify right side
   19,861.62x = 299,002,721.90
5. Step 5: Solve for x
   x = 299,002,721.90/19,861.62
6. Step 6: Final answer
   x = 15,054.30