Finding the Fourth Proportional to 6,427.89, 9,642.78 and 2,267.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,427.89 : 9,642.78 = 2,267.15 : x
2. Step 2: Convert to fraction form
   6,427.89/9,642.78 = 2,267.15/x
3. Step 3: Cross multiply
   6,427.89x = 9,642.78 × 2,267.15
4. Step 4: Simplify right side
   6,427.89x = 21,861,580.46
5. Step 5: Solve for x
   x = 21,861,580.46/6,427.89
6. Step 6: Final answer
   x = 3,401.05