Finding the Fourth Proportional to 12,905.11, 17,814.50 and 8,719.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,905.11 : 17,814.50 = 8,719.03 : x
2. Step 2: Convert to fraction form
   12,905.11/17,814.50 = 8,719.03/x
3. Step 3: Cross multiply
   12,905.11x = 17,814.50 × 8,719.03
4. Step 4: Simplify right side
   12,905.11x = 155,325,116.34
5. Step 5: Solve for x
   x = 155,325,116.34/12,905.11
6. Step 6: Final answer
   x = 12,035.94