Finding the Fourth Proportional to 2,453.79, 3,680.72 and 873.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.79 : 3,680.72 = 873.77 : x
2. Step 2: Convert to fraction form
   2,453.79/3,680.72 = 873.77/x
3. Step 3: Cross multiply
   2,453.79x = 3,680.72 × 873.77
4. Step 4: Simplify right side
   2,453.79x = 3,216,079.94
5. Step 5: Solve for x
   x = 3,216,079.94/2,453.79
6. Step 6: Final answer
   x = 1,310.66