Finding the Fourth Proportional to 8,167.20, 12,245.69 and 3,422.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,167.20 : 12,245.69 = 3,422.07 : x
2. Step 2: Convert to fraction form
   8,167.20/12,245.69 = 3,422.07/x
3. Step 3: Cross multiply
   8,167.20x = 12,245.69 × 3,422.07
4. Step 4: Simplify right side
   8,167.20x = 41,905,641.75
5. Step 5: Solve for x
   x = 41,905,641.75/8,167.20
6. Step 6: Final answer
   x = 5,130.97