Finding the Fourth Proportional to 12,811, 19,219.34 and 3,927.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,811 : 19,219.34 = 3,927.56 : x
2. Step 2: Convert to fraction form
   12,811/19,219.34 = 3,927.56/x
3. Step 3: Cross multiply
   12,811x = 19,219.34 × 3,927.56
4. Step 4: Simplify right side
   12,811x = 75,485,111.01
5. Step 5: Solve for x
   x = 75,485,111.01/12,811
6. Step 6: Final answer
   x = 5,892.21