Finding the Fourth Proportional to 8,142.40, 12,219.43 and 3,465.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,142.40 : 12,219.43 = 3,465.69 : x
2. Step 2: Convert to fraction form
   8,142.40/12,219.43 = 3,465.69/x
3. Step 3: Cross multiply
   8,142.40x = 12,219.43 × 3,465.69
4. Step 4: Simplify right side
   8,142.40x = 42,348,747.69
5. Step 5: Solve for x
   x = 42,348,747.69/8,142.40
6. Step 6: Final answer
   x = 5,201.02