Finding the Fourth Proportional to 5,781.72, 7,976.70 and 3,512.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,781.72 : 7,976.70 = 3,512.28 : x
2. Step 2: Convert to fraction form
   5,781.72/7,976.70 = 3,512.28/x
3. Step 3: Cross multiply
   5,781.72x = 7,976.70 × 3,512.28
4. Step 4: Simplify right side
   5,781.72x = 28,016,403.88
5. Step 5: Solve for x
   x = 28,016,403.88/5,781.72
6. Step 6: Final answer
   x = 4,845.69