Finding the Fourth Proportional to 8,142.21, 12,224.61 and 4,196.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,142.21 : 12,224.61 = 4,196.29 : x
2. Step 2: Convert to fraction form
   8,142.21/12,224.61 = 4,196.29/x
3. Step 3: Cross multiply
   8,142.21x = 12,224.61 × 4,196.29
4. Step 4: Simplify right side
   8,142.21x = 51,298,008.70
5. Step 5: Solve for x
   x = 51,298,008.70/8,142.21
6. Step 6: Final answer
   x = 6,300.26