Finding the Fourth Proportional to 3,687.75, 5,543.78 and 3,417.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,687.75 : 5,543.78 = 3,417.12 : x
2. Step 2: Convert to fraction form
   3,687.75/5,543.78 = 3,417.12/x
3. Step 3: Cross multiply
   3,687.75x = 5,543.78 × 3,417.12
4. Step 4: Simplify right side
   3,687.75x = 18,943,744.43
5. Step 5: Solve for x
   x = 18,943,744.43/3,687.75
6. Step 6: Final answer
   x = 5,136.94