Finding the Fourth Proportional to 2,563.05, 3,844.58 and 1,978.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,563.05 : 3,844.58 = 1,978.91 : x
2. Step 2: Convert to fraction form
   2,563.05/3,844.58 = 1,978.91/x
3. Step 3: Cross multiply
   2,563.05x = 3,844.58 × 1,978.91
4. Step 4: Simplify right side
   2,563.05x = 7,608,048.69
5. Step 5: Solve for x
   x = 7,608,048.69/2,563.05
6. Step 6: Final answer
   x = 2,968.36