Finding the Fourth Proportional to 2,713.86, 4,070.31 and 960.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,713.86 : 4,070.31 = 960.15 : x
2. Step 2: Convert to fraction form
   2,713.86/4,070.31 = 960.15/x
3. Step 3: Cross multiply
   2,713.86x = 4,070.31 × 960.15
4. Step 4: Simplify right side
   2,713.86x = 3,908,108.15
5. Step 5: Solve for x
   x = 3,908,108.15/2,713.86
6. Step 6: Final answer
   x = 1,440.06