Finding the Fourth Proportional to 6,142.78, 8,470.33 and 4,149.87

Step by Step Solution

1. Step 1: Write the proportion equation
   6,142.78 : 8,470.33 = 4,149.87 : x
2. Step 2: Convert to fraction form
   6,142.78/8,470.33 = 4,149.87/x
3. Step 3: Cross multiply
   6,142.78x = 8,470.33 × 4,149.87
4. Step 4: Simplify right side
   6,142.78x = 35,150,768.36
5. Step 5: Solve for x
   x = 35,150,768.36/6,142.78
6. Step 6: Final answer
   x = 5,722.29