Finding the Fourth Proportional to 3,722.78, 5,543.64 and 3,681.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,722.78 : 5,543.64 = 3,681.86 : x
2. Step 2: Convert to fraction form
   3,722.78/5,543.64 = 3,681.86/x
3. Step 3: Cross multiply
   3,722.78x = 5,543.64 × 3,681.86
4. Step 4: Simplify right side
   3,722.78x = 20,410,906.37
5. Step 5: Solve for x
   x = 20,410,906.37/3,722.78
6. Step 6: Final answer
   x = 5,482.71