Finding the Fourth Proportional to 6,402.56, 9,591.06 and 3,942.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,402.56 : 9,591.06 = 3,942.18 : x
2. Step 2: Convert to fraction form
   6,402.56/9,591.06 = 3,942.18/x
3. Step 3: Cross multiply
   6,402.56x = 9,591.06 × 3,942.18
4. Step 4: Simplify right side
   6,402.56x = 37,809,684.91
5. Step 5: Solve for x
   x = 37,809,684.91/6,402.56
6. Step 6: Final answer
   x = 5,905.40