Finding the Fourth Proportional to 2,957.96, 4,429.25 and 2,870.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,957.96 : 4,429.25 = 2,870.31 : x
2. Step 2: Convert to fraction form
   2,957.96/4,429.25 = 2,870.31/x
3. Step 3: Cross multiply
   2,957.96x = 4,429.25 × 2,870.31
4. Step 4: Simplify right side
   2,957.96x = 12,713,333.59
5. Step 5: Solve for x
   x = 12,713,333.59/2,957.96
6. Step 6: Final answer
   x = 4,298.00