Finding the Fourth Proportional to 3,783.34, 5,687.16 and 3,512.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,783.34 : 5,687.16 = 3,512.80 : x
2. Step 2: Convert to fraction form
   3,783.34/5,687.16 = 3,512.80/x
3. Step 3: Cross multiply
   3,783.34x = 5,687.16 × 3,512.80
4. Step 4: Simplify right side
   3,783.34x = 19,977,855.65
5. Step 5: Solve for x
   x = 19,977,855.65/3,783.34
6. Step 6: Final answer
   x = 5,280.48