Finding the Fourth Proportional to 8,737.21, 12,057.47 and 4,960.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,737.21 : 12,057.47 = 4,960.09 : x
2. Step 2: Convert to fraction form
   8,737.21/12,057.47 = 4,960.09/x
3. Step 3: Cross multiply
   8,737.21x = 12,057.47 × 4,960.09
4. Step 4: Simplify right side
   8,737.21x = 59,806,136.37
5. Step 5: Solve for x
   x = 59,806,136.37/8,737.21
6. Step 6: Final answer
   x = 6,844.99