Finding the Fourth Proportional to 12,756.42, 19,133.69 and 7,826.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,756.42 : 19,133.69 = 7,826.76 : x
2. Step 2: Convert to fraction form
   12,756.42/19,133.69 = 7,826.76/x
3. Step 3: Cross multiply
   12,756.42x = 19,133.69 × 7,826.76
4. Step 4: Simplify right side
   12,756.42x = 149,754,760.41
5. Step 5: Solve for x
   x = 149,754,760.41/12,756.42
6. Step 6: Final answer
   x = 11,739.56