Finding the Fourth Proportional to 5,680.82, 7,840.83 and 3,687.92

Step by Step Solution

1. Step 1: Write the proportion equation
   5,680.82 : 7,840.83 = 3,687.92 : x
2. Step 2: Convert to fraction form
   5,680.82/7,840.83 = 3,687.92/x
3. Step 3: Cross multiply
   5,680.82x = 7,840.83 × 3,687.92
4. Step 4: Simplify right side
   5,680.82x = 28,916,353.77
5. Step 5: Solve for x
   x = 28,916,353.77/5,680.82
6. Step 6: Final answer
   x = 5,090.17