Finding the Fourth Proportional to 12,743.44, 19,108.92 and 3,978.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,743.44 : 19,108.92 = 3,978.32 : x
2. Step 2: Convert to fraction form
   12,743.44/19,108.92 = 3,978.32/x
3. Step 3: Cross multiply
   12,743.44x = 19,108.92 × 3,978.32
4. Step 4: Simplify right side
   12,743.44x = 76,021,398.61
5. Step 5: Solve for x
   x = 76,021,398.61/12,743.44
6. Step 6: Final answer
   x = 5,965.53