Finding the Fourth Proportional to 8,385.42, 12,579.48 and 2,839.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,385.42 : 12,579.48 = 2,839.10 : x
2. Step 2: Convert to fraction form
   8,385.42/12,579.48 = 2,839.10/x
3. Step 3: Cross multiply
   8,385.42x = 12,579.48 × 2,839.10
4. Step 4: Simplify right side
   8,385.42x = 35,714,401.67
5. Step 5: Solve for x
   x = 35,714,401.67/8,385.42
6. Step 6: Final answer
   x = 4,259.11