Finding the Fourth Proportional to 2,713.10, 4,069.78 and 957.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.10 : 4,069.78 = 957.89 : x
2. Step 2: Convert to fraction form
   2,713.10/4,069.78 = 957.89/x
3. Step 3: Cross multiply
   2,713.10x = 4,069.78 × 957.89
4. Step 4: Simplify right side
   2,713.10x = 3,898,409.34
5. Step 5: Solve for x
   x = 3,898,409.34/2,713.10
6. Step 6: Final answer
   x = 1,436.89