Finding the Fourth Proportional to 2,469.86, 3,705.32 and 715.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,469.86 : 3,705.32 = 715.15 : x
2. Step 2: Convert to fraction form
   2,469.86/3,705.32 = 715.15/x
3. Step 3: Cross multiply
   2,469.86x = 3,705.32 × 715.15
4. Step 4: Simplify right side
   2,469.86x = 2,649,859.60
5. Step 5: Solve for x
   x = 2,649,859.60/2,469.86
6. Step 6: Final answer
   x = 1,072.88