Finding the Fourth Proportional to 8,142.20, 12,213.09 and 2,298.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,142.20 : 12,213.09 = 2,298.72 : x
2. Step 2: Convert to fraction form
   8,142.20/12,213.09 = 2,298.72/x
3. Step 3: Cross multiply
   8,142.20x = 12,213.09 × 2,298.72
4. Step 4: Simplify right side
   8,142.20x = 28,074,474.24
5. Step 5: Solve for x
   x = 28,074,474.24/8,142.20
6. Step 6: Final answer
   x = 3,448.02