Finding the Fourth Proportional to 3,921.45, 5,871.79 and 3,693.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.45 : 5,871.79 = 3,693.84 : x
2. Step 2: Convert to fraction form
   3,921.45/5,871.79 = 3,693.84/x
3. Step 3: Cross multiply
   3,921.45x = 5,871.79 × 3,693.84
4. Step 4: Simplify right side
   3,921.45x = 21,689,435.37
5. Step 5: Solve for x
   x = 21,689,435.37/3,921.45
6. Step 6: Final answer
   x = 5,530.98