Finding the Fourth Proportional to 2,470.30, 3,704.89 and 715.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.30 : 3,704.89 = 715.31 : x
2. Step 2: Convert to fraction form
   2,470.30/3,704.89 = 715.31/x
3. Step 3: Cross multiply
   2,470.30x = 3,704.89 × 715.31
4. Step 4: Simplify right side
   2,470.30x = 2,650,129.37
5. Step 5: Solve for x
   x = 2,650,129.37/2,470.30
6. Step 6: Final answer
   x = 1,072.80