Finding the Fourth Proportional to 3,722.06, 5,172.06 and 3,681.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,722.06 : 5,172.06 = 3,681.56 : x
2. Step 2: Convert to fraction form
   3,722.06/5,172.06 = 3,681.56/x
3. Step 3: Cross multiply
   3,722.06x = 5,172.06 × 3,681.56
4. Step 4: Simplify right side
   3,722.06x = 19,041,249.21
5. Step 5: Solve for x
   x = 19,041,249.21/3,722.06
6. Step 6: Final answer
   x = 5,115.78