Finding the Fourth Proportional to 8,440.29, 12,662.21 and 2,892.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,440.29 : 12,662.21 = 2,892.15 : x
2. Step 2: Convert to fraction form
   8,440.29/12,662.21 = 2,892.15/x
3. Step 3: Cross multiply
   8,440.29x = 12,662.21 × 2,892.15
4. Step 4: Simplify right side
   8,440.29x = 36,621,017.88
5. Step 5: Solve for x
   x = 36,621,017.88/8,440.29
6. Step 6: Final answer
   x = 4,338.83