Finding the Fourth Proportional to 3,670.55, 5,061.35 and 2,728.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670.55 : 5,061.35 = 2,728.09 : x
2. Step 2: Convert to fraction form
   3,670.55/5,061.35 = 2,728.09/x
3. Step 3: Cross multiply
   3,670.55x = 5,061.35 × 2,728.09
4. Step 4: Simplify right side
   3,670.55x = 13,807,804.68
5. Step 5: Solve for x
   x = 13,807,804.68/3,670.55
6. Step 6: Final answer
   x = 3,761.78