Finding the Fourth Proportional to 9,640.05, 14,443.57 and 5,260.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,640.05 : 14,443.57 = 5,260.58 : x
2. Step 2: Convert to fraction form
   9,640.05/14,443.57 = 5,260.58/x
3. Step 3: Cross multiply
   9,640.05x = 14,443.57 × 5,260.58
4. Step 4: Simplify right side
   9,640.05x = 75,981,514.40
5. Step 5: Solve for x
   x = 75,981,514.40/9,640.05
6. Step 6: Final answer
   x = 7,881.86