Finding the Fourth Proportional to 2,177.89, 3,008.55 and 1,981.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,177.89 : 3,008.55 = 1,981.06 : x
2. Step 2: Convert to fraction form
   2,177.89/3,008.55 = 1,981.06/x
3. Step 3: Cross multiply
   2,177.89x = 3,008.55 × 1,981.06
4. Step 4: Simplify right side
   2,177.89x = 5,960,118.06
5. Step 5: Solve for x
   x = 5,960,118.06/2,177.89
6. Step 6: Final answer
   x = 2,736.65