Finding the Fourth Proportional to 2,764.27, 3,813.31 and 1,978.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,764.27 : 3,813.31 = 1,978.77 : x
2. Step 2: Convert to fraction form
   2,764.27/3,813.31 = 1,978.77/x
3. Step 3: Cross multiply
   2,764.27x = 3,813.31 × 1,978.77
4. Step 4: Simplify right side
   2,764.27x = 7,545,663.43
5. Step 5: Solve for x
   x = 7,545,663.43/2,764.27
6. Step 6: Final answer
   x = 2,729.71