Finding the Fourth Proportional to 12,861.27, 19,288.83 and 4,426.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861.27 : 19,288.83 = 4,426.83 : x
2. Step 2: Convert to fraction form
   12,861.27/19,288.83 = 4,426.83/x
3. Step 3: Cross multiply
   12,861.27x = 19,288.83 × 4,426.83
4. Step 4: Simplify right side
   12,861.27x = 85,388,371.31
5. Step 5: Solve for x
   x = 85,388,371.31/12,861.27
6. Step 6: Final answer
   x = 6,639.19