Finding the Fourth Proportional to 6,400.56, 9,588.06 and 3,940.17

Step by Step Solution

1. Step 1: Write the proportion equation
   6,400.56 : 9,588.06 = 3,940.17 : x
2. Step 2: Convert to fraction form
   6,400.56/9,588.06 = 3,940.17/x
3. Step 3: Cross multiply
   6,400.56x = 9,588.06 × 3,940.17
4. Step 4: Simplify right side
   6,400.56x = 37,778,586.37
5. Step 5: Solve for x
   x = 37,778,586.37/6,400.56
6. Step 6: Final answer
   x = 5,902.39