Finding the Fourth Proportional to 2,104.53, 3,156.72 and 717.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.53 : 3,156.72 = 717.91 : x
2. Step 2: Convert to fraction form
   2,104.53/3,156.72 = 717.91/x
3. Step 3: Cross multiply
   2,104.53x = 3,156.72 × 717.91
4. Step 4: Simplify right side
   2,104.53x = 2,266,252.07
5. Step 5: Solve for x
   x = 2,266,252.07/2,104.53
6. Step 6: Final answer
   x = 1,076.84