Finding the Fourth Proportional to 5,816.58, 8,721.57 and 3,969.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,816.58 : 8,721.57 = 3,969.94 : x
2. Step 2: Convert to fraction form
   5,816.58/8,721.57 = 3,969.94/x
3. Step 3: Cross multiply
   5,816.58x = 8,721.57 × 3,969.94
4. Step 4: Simplify right side
   5,816.58x = 34,624,109.61
5. Step 5: Solve for x
   x = 34,624,109.61/5,816.58
6. Step 6: Final answer
   x = 5,952.66