Finding the Fourth Proportional to 2,773.72, 4,160.79 and 873.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,773.72 : 4,160.79 = 873.88 : x
2. Step 2: Convert to fraction form
   2,773.72/4,160.79 = 873.88/x
3. Step 3: Cross multiply
   2,773.72x = 4,160.79 × 873.88
4. Step 4: Simplify right side
   2,773.72x = 3,636,020.76
5. Step 5: Solve for x
   x = 3,636,020.76/2,773.72
6. Step 6: Final answer
   x = 1,310.88