Finding the Fourth Proportional to 2,768.72, 3,817.14 and 1,981.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,768.72 : 3,817.14 = 1,981.40 : x
2. Step 2: Convert to fraction form
   2,768.72/3,817.14 = 1,981.40/x
3. Step 3: Cross multiply
   2,768.72x = 3,817.14 × 1,981.40
4. Step 4: Simplify right side
   2,768.72x = 7,563,281.20
5. Step 5: Solve for x
   x = 7,563,281.20/2,768.72
6. Step 6: Final answer
   x = 2,731.69