Finding the Fourth Proportional to 8,127.12, 12,189.58 and 3,449

Step by Step Solution

1. Step 1: Write the proportion equation
   8,127.12 : 12,189.58 = 3,449 : x
2. Step 2: Convert to fraction form
   8,127.12/12,189.58 = 3,449/x
3. Step 3: Cross multiply
   8,127.12x = 12,189.58 × 3,449
4. Step 4: Simplify right side
   8,127.12x = 42,041,861.42
5. Step 5: Solve for x
   x = 42,041,861.42/8,127.12
6. Step 6: Final answer
   x = 5,173.03