Finding the Fourth Proportional to 2,979.72, 4,476.87 and 2,813.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.72 : 4,476.87 = 2,813.94 : x
2. Step 2: Convert to fraction form
   2,979.72/4,476.87 = 2,813.94/x
3. Step 3: Cross multiply
   2,979.72x = 4,476.87 × 2,813.94
4. Step 4: Simplify right side
   2,979.72x = 12,597,643.57
5. Step 5: Solve for x
   x = 12,597,643.57/2,979.72
6. Step 6: Final answer
   x = 4,227.79