Finding the Fourth Proportional to 12,742.29, 19,112.76 and 3,976.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,742.29 : 19,112.76 = 3,976.20 : x
2. Step 2: Convert to fraction form
   12,742.29/19,112.76 = 3,976.20/x
3. Step 3: Cross multiply
   12,742.29x = 19,112.76 × 3,976.20
4. Step 4: Simplify right side
   12,742.29x = 75,996,156.31
5. Step 5: Solve for x
   x = 75,996,156.31/12,742.29
6. Step 6: Final answer
   x = 5,964.09