Finding the Fourth Proportional to 2,777.82, 3,831.48 and 1,981.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,777.82 : 3,831.48 = 1,981.05 : x
2. Step 2: Convert to fraction form
   2,777.82/3,831.48 = 1,981.05/x
3. Step 3: Cross multiply
   2,777.82x = 3,831.48 × 1,981.05
4. Step 4: Simplify right side
   2,777.82x = 7,590,353.45
5. Step 5: Solve for x
   x = 7,590,353.45/2,777.82
6. Step 6: Final answer
   x = 2,732.49