Finding the Fourth Proportional to 8,219.34, 12,320.91 and 3,540.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,219.34 : 12,320.91 = 3,540.42 : x
2. Step 2: Convert to fraction form
   8,219.34/12,320.91 = 3,540.42/x
3. Step 3: Cross multiply
   8,219.34x = 12,320.91 × 3,540.42
4. Step 4: Simplify right side
   8,219.34x = 43,621,196.18
5. Step 5: Solve for x
   x = 43,621,196.18/8,219.34
6. Step 6: Final answer
   x = 5,307.14