Finding the Fourth Proportional to 5,680.54, 7,834.71 and 3,691.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,680.54 : 7,834.71 = 3,691.74 : x
2. Step 2: Convert to fraction form
   5,680.54/7,834.71 = 3,691.74/x
3. Step 3: Cross multiply
   5,680.54x = 7,834.71 × 3,691.74
4. Step 4: Simplify right side
   5,680.54x = 28,923,712.30
5. Step 5: Solve for x
   x = 28,923,712.30/5,680.54
6. Step 6: Final answer
   x = 5,091.72