Finding the Fourth Proportional to 2,520.69, 3,780.51 and 960.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.69 : 3,780.51 = 960.13 : x
2. Step 2: Convert to fraction form
   2,520.69/3,780.51 = 960.13/x
3. Step 3: Cross multiply
   2,520.69x = 3,780.51 × 960.13
4. Step 4: Simplify right side
   2,520.69x = 3,629,781.07
5. Step 5: Solve for x
   x = 3,629,781.07/2,520.69
6. Step 6: Final answer
   x = 1,440.00