Finding the Fourth Proportional to 12,742.08, 19,105.92 and 5,243.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,742.08 : 19,105.92 = 5,243.55 : x
2. Step 2: Convert to fraction form
   12,742.08/19,105.92 = 5,243.55/x
3. Step 3: Cross multiply
   12,742.08x = 19,105.92 × 5,243.55
4. Step 4: Simplify right side
   12,742.08x = 100,182,846.82
5. Step 5: Solve for x
   x = 100,182,846.82/12,742.08
6. Step 6: Final answer
   x = 7,862.36