Finding the Fourth Proportional to 3,822.72, 5,275.56 and 2,876.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,822.72 : 5,275.56 = 2,876.81 : x
2. Step 2: Convert to fraction form
   3,822.72/5,275.56 = 2,876.81/x
3. Step 3: Cross multiply
   3,822.72x = 5,275.56 × 2,876.81
4. Step 4: Simplify right side
   3,822.72x = 15,176,757.39
5. Step 5: Solve for x
   x = 15,176,757.39/3,822.72
6. Step 6: Final answer
   x = 3,970.15