Finding the Fourth Proportional to 8,279.02, 12,421.59 and 3,838.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,279.02 : 12,421.59 = 3,838.80 : x
2. Step 2: Convert to fraction form
   8,279.02/12,421.59 = 3,838.80/x
3. Step 3: Cross multiply
   8,279.02x = 12,421.59 × 3,838.80
4. Step 4: Simplify right side
   8,279.02x = 47,683,999.69
5. Step 5: Solve for x
   x = 47,683,999.69/8,279.02
6. Step 6: Final answer
   x = 5,759.62