Finding the Fourth Proportional to 3,783.31, 5,670.76 and 2,855.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,783.31 : 5,670.76 = 2,855.86 : x
2. Step 2: Convert to fraction form
   3,783.31/5,670.76 = 2,855.86/x
3. Step 3: Cross multiply
   3,783.31x = 5,670.76 × 2,855.86
4. Step 4: Simplify right side
   3,783.31x = 16,194,896.65
5. Step 5: Solve for x
   x = 16,194,896.65/3,783.31
6. Step 6: Final answer
   x = 4,280.62