Finding the Fourth Proportional to 2,470.57, 3,707.31 and 911.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.57 : 3,707.31 = 911.67 : x
2. Step 2: Convert to fraction form
   2,470.57/3,707.31 = 911.67/x
3. Step 3: Cross multiply
   2,470.57x = 3,707.31 × 911.67
4. Step 4: Simplify right side
   2,470.57x = 3,379,843.31
5. Step 5: Solve for x
   x = 3,379,843.31/2,470.57
6. Step 6: Final answer
   x = 1,368.04