Finding the Fourth Proportional to 12,761.31, 19,145.22 and 3,996.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,761.31 : 19,145.22 = 3,996.30 : x
2. Step 2: Convert to fraction form
   12,761.31/19,145.22 = 3,996.30/x
3. Step 3: Cross multiply
   12,761.31x = 19,145.22 × 3,996.30
4. Step 4: Simplify right side
   12,761.31x = 76,510,042.69
5. Step 5: Solve for x
   x = 76,510,042.69/12,761.31
6. Step 6: Final answer
   x = 5,995.47