Finding the Fourth Proportional to 2,736.78, 4,105.23 and 981.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,736.78 : 4,105.23 = 981.90 : x
2. Step 2: Convert to fraction form
   2,736.78/4,105.23 = 981.90/x
3. Step 3: Cross multiply
   2,736.78x = 4,105.23 × 981.90
4. Step 4: Simplify right side
   2,736.78x = 4,030,899.90
5. Step 5: Solve for x
   x = 4,030,899.90/2,736.78
6. Step 6: Final answer
   x = 1,472.86