Finding the Fourth Proportional to 8,214.48, 12,294.72 and 7,426.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,214.48 : 12,294.72 = 7,426.80 : x
2. Step 2: Convert to fraction form
   8,214.48/12,294.72 = 7,426.80/x
3. Step 3: Cross multiply
   8,214.48x = 12,294.72 × 7,426.80
4. Step 4: Simplify right side
   8,214.48x = 91,310,426.50
5. Step 5: Solve for x
   x = 91,310,426.50/8,214.48
6. Step 6: Final answer
   x = 11,115.79