Finding the Fourth Proportional to 2,883.12, 3,978.78 and 1,764.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,883.12 : 3,978.78 = 1,764.03 : x
2. Step 2: Convert to fraction form
   2,883.12/3,978.78 = 1,764.03/x
3. Step 3: Cross multiply
   2,883.12x = 3,978.78 × 1,764.03
4. Step 4: Simplify right side
   2,883.12x = 7,018,687.28
5. Step 5: Solve for x
   x = 7,018,687.28/2,883.12
6. Step 6: Final answer
   x = 2,434.41