Finding the Fourth Proportional to 2,835.72, 4,253.31 and 986.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,835.72 : 4,253.31 = 986.76 : x
2. Step 2: Convert to fraction form
   2,835.72/4,253.31 = 986.76/x
3. Step 3: Cross multiply
   2,835.72x = 4,253.31 × 986.76
4. Step 4: Simplify right side
   2,835.72x = 4,196,996.18
5. Step 5: Solve for x
   x = 4,196,996.18/2,835.72
6. Step 6: Final answer
   x = 1,480.05