Finding the Fourth Proportional to 2,883.36, 3,978.72 and 1,764.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,883.36 : 3,978.72 = 1,764.57 : x
2. Step 2: Convert to fraction form
   2,883.36/3,978.72 = 1,764.57/x
3. Step 3: Cross multiply
   2,883.36x = 3,978.72 × 1,764.57
4. Step 4: Simplify right side
   2,883.36x = 7,020,729.95
5. Step 5: Solve for x
   x = 7,020,729.95/2,883.36
6. Step 6: Final answer
   x = 2,434.91