Finding the Fourth Proportional to 2,315.76, 3,472.38 and 834.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.76 : 3,472.38 = 834.78 : x
2. Step 2: Convert to fraction form
   2,315.76/3,472.38 = 834.78/x
3. Step 3: Cross multiply
   2,315.76x = 3,472.38 × 834.78
4. Step 4: Simplify right side
   2,315.76x = 2,898,673.38
5. Step 5: Solve for x
   x = 2,898,673.38/2,315.76
6. Step 6: Final answer
   x = 1,251.72