Finding the Fourth Proportional to 4,279.59, 6,404.81 and 3,181.23

Step by Step Solution

1. Step 1: Write the proportion equation
   4,279.59 : 6,404.81 = 3,181.23 : x
2. Step 2: Convert to fraction form
   4,279.59/6,404.81 = 3,181.23/x
3. Step 3: Cross multiply
   4,279.59x = 6,404.81 × 3,181.23
4. Step 4: Simplify right side
   4,279.59x = 20,375,157.81
5. Step 5: Solve for x
   x = 20,375,157.81/4,279.59
6. Step 6: Final answer
   x = 4,761.01