Finding the Fourth Proportional to 6,131.81, 8,460.09 and 3,579.09

Step by Step Solution

1. Step 1: Write the proportion equation
   6,131.81 : 8,460.09 = 3,579.09 : x
2. Step 2: Convert to fraction form
   6,131.81/8,460.09 = 3,579.09/x
3. Step 3: Cross multiply
   6,131.81x = 8,460.09 × 3,579.09
4. Step 4: Simplify right side
   6,131.81x = 30,279,423.52
5. Step 5: Solve for x
   x = 30,279,423.52/6,131.81
6. Step 6: Final answer
   x = 4,938.09