Finding the Fourth Proportional to 2,979.18, 4,478.89 and 2,435.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.18 : 4,478.89 = 2,435.31 : x
2. Step 2: Convert to fraction form
   2,979.18/4,478.89 = 2,435.31/x
3. Step 3: Cross multiply
   2,979.18x = 4,478.89 × 2,435.31
4. Step 4: Simplify right side
   2,979.18x = 10,907,485.61
5. Step 5: Solve for x
   x = 10,907,485.61/2,979.18
6. Step 6: Final answer
   x = 3,661.24