Finding the Fourth Proportional to 2,563.91, 3,847.69 and 1,979.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,563.91 : 3,847.69 = 1,979.50 : x
2. Step 2: Convert to fraction form
   2,563.91/3,847.69 = 1,979.50/x
3. Step 3: Cross multiply
   2,563.91x = 3,847.69 × 1,979.50
4. Step 4: Simplify right side
   2,563.91x = 7,616,502.36
5. Step 5: Solve for x
   x = 7,616,502.36/2,563.91
6. Step 6: Final answer
   x = 2,970.66