Finding the Fourth Proportional to 2,655.72, 3,983.90 and 876.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,655.72 : 3,983.90 = 876.84 : x
2. Step 2: Convert to fraction form
   2,655.72/3,983.90 = 876.84/x
3. Step 3: Cross multiply
   2,655.72x = 3,983.90 × 876.84
4. Step 4: Simplify right side
   2,655.72x = 3,493,242.88
5. Step 5: Solve for x
   x = 3,493,242.88/2,655.72
6. Step 6: Final answer
   x = 1,315.37